diff --git a/static/js/shop/ProductCartItem.jsx b/static/js/shop/ProductCartItem.jsx
index 7831f29..2a693d7 100644
--- a/static/js/shop/ProductCartItem.jsx
+++ b/static/js/shop/ProductCartItem.jsx
@@ -1,11 +1,10 @@
 import React, {PureComponent} from 'react'
 import PropTypes from "prop-types";
 import {Draggable} from "@hello-pangea/dnd";
-import {OverlayTrigger} from "react-bootstrap";
 import {DialogPopup} from "./options/DialogPopup.jsx";
 import {productStyle} from "./utils";
 import {Resources} from "./Resources.jsx";
-import {Warnings} from "./Warnings";
+import {Warnings} from "./Warnings.jsx";
 
 /**
  * Component that renders a product.
@@ -82,20 +81,12 @@ export class ProductCartItem extends PureComponent {
             first,
             last,
             ext_data,
-            resources,
             onCardUpdate,
         } = this.props;
 
-        let warning, options, options_data;
-        if (data && data.warnings) {
-            const warningsKeys = Object.keys(data.warnings);
-            if (warningsKeys && warningsKeys.length > 0) {
-                // we display only the first warning
-                warning = data.warnings[warningsKeys[0]];
-            }
-        }
-
-
+        let options, options_data;
+        const warnings = data && data.show_warnings;
+        const resources = data && data.counted_resources;
 
         if (data && data.options) {
             options = data.options;
@@ -104,10 +95,6 @@ export class ProductCartItem extends PureComponent {
             options_data.ext_data = ext_data;
         }
 
-        let render_progress;
-        if (data) {
-
-        }
 
         return (
             <Draggable draggableId={model.id} index={index}>
@@ -132,8 +119,8 @@ export class ProductCartItem extends PureComponent {
                         {/* warning container */}
 
                         <div className="progress-container warning d-flex justify-content-evenly">
-                            {warning &&
-                                (<Warnings warnings={warning} />)
+                            {warnings && warnings.length > 0 &&
+                                (<Warnings warnings={warnings} />)
                             }
 
                             {options && (
diff --git a/static/js/shop/Resources.jsx b/static/js/shop/Resources.jsx
index 4304ce9..34b0cf0 100644
--- a/static/js/shop/Resources.jsx
+++ b/static/js/shop/Resources.jsx
@@ -1,5 +1,6 @@
 import {OverlayTrigger} from "react-bootstrap";
 import React from "react";
+import {v4 as uuidv4} from "uuid";
 
 
 const resourcesWidthStyle = (occupied, max) => {
@@ -10,7 +11,7 @@ const resourcesWidthStyle = (occupied, max) => {
 
 function EEMRenderer({occupied, max}) {
     return (
-        <div className="nbr-connectors">
+        <div className="nbr-connectors" key={uuidv4()}>
             <div style={{...resourcesWidthStyle(occupied, max)}}></div>
         </div>
     )
@@ -18,7 +19,7 @@ function EEMRenderer({occupied, max}) {
 
 function ClockRenderer({occupied, max}) {
     return (
-        <div className="nbr-clocks">
+        <div className="nbr-clocks" key={uuidv4()}>
             <div style={{...resourcesWidthStyle(occupied, max)}}></div>
         </div>
     )
@@ -32,15 +33,15 @@ const resource_progress_renderers = {
 
 
 function EEMTipRender({occupied, max}) {
-    return (<p>{`${occupied}/${max} EEM connectors used`}</p>);
+    return (<p key={uuidv4()}>{`${occupied}/${max} EEM connectors used`}</p>);
 }
 
 function IDCTipRender({occupied, max}) {
-    return (<p>{`${occupied}/${max} IDC connectors used`}</p>);
+    return (<p key={uuidv4()}>{`${occupied}/${max} IDC connectors used`}</p>);
 }
 
 function ClockTipRender({occupied, max}) {
-    return (<p>{`${occupied}/${max} clock connectors used`}</p>);
+    return (<p key={uuidv4()}>{`${occupied}/${max} clock connectors used`}</p>);
 }
 
 const resource_tip = {
diff --git a/static/js/shop/Shop.jsx b/static/js/shop/Shop.jsx
index 70caffc..a841f10 100644
--- a/static/js/shop/Shop.jsx
+++ b/static/js/shop/Shop.jsx
@@ -14,6 +14,8 @@ import {Crate} from "./Crate.jsx";
 import {Cart} from "./Cart.jsx";
 import {OrderSummary} from "./OrderSummary.jsx";
 import {OrderForm} from "./OrderForm.jsx";
+import {TriggerWarnings} from "./warnings";
+import {FillResources} from "./count_resources";
 
 /**
  * Component that render the entire shop
@@ -465,18 +467,18 @@ export class Shop extends PureComponent {
             crateRules,
         } = this.state;
 
-        const itemsCloned = Array.from(newItems);
-        const itemsData = [];
+        let itemsCloned = Array.from(newItems);
         const rules = {};
 
         itemsCloned.forEach((elem, idx) => {
-            if (!(idx in itemsData)) itemsData[idx] = elem;
+            if (!(idx in itemsCloned)) itemsCloned[idx] = elem;
             if (idx in this.state.columns.cart.itemsData && this.state.columns.cart.itemsData[idx].options_data) {
                 itemsCloned[idx].options_data = this.state.columns.cart.itemsData[idx].options_data;
             }
-            itemsData[idx].warnings = {};
         });
 
+        itemsCloned = FillResources(itemsCloned);
+        itemsCloned = TriggerWarnings(itemsCloned);
 
         // check number of slot in crate
         const nbrOccupied = nbrOccupiedSlotsInCrate(newItems);
@@ -486,278 +488,6 @@ export class Shop extends PureComponent {
             rules[crateRules.compactSlot.type] = {...crateRules.compactSlot};
         }
 
-
-        // check the number of EEM connectors available for all Kasli
-        const idxK = itemsCloned.reduce((prev, next, i) => {
-            if (next.type === 'kasli' || next.type === 'vhdcicarrier') {
-                prev.push(i);
-            }
-            return prev;
-        }, []);
-        for (let i = 0; i <= idxK.length - 1; i++) {
-            let slots;
-            let nbUsedSlot = 0;
-            let nbrCurrentClock = 0;
-            let idx = idxK[i];
-
-            if (i !== idxK.length - 1) {
-                slots = itemsCloned.slice(idx + 1, idxK[i + 1]);
-            } else {
-                slots = itemsCloned.slice(idx + 1);
-            }
-
-            if (i == 0) {
-                const slots_need_resource = itemsCloned.slice(0, idx);
-                const idx_need = slots_need_resource.findIndex(e => (e.rules && e.rules.resources));
-
-                if (idx_need != -1) {
-                    if (idx_need in itemsData) {
-                        if ('warnings' in itemsData[idx_need]) {
-                            itemsData[idx_need].warnings.resources = {...itemsCloned[idx_need].rules.resources};
-                        } else {
-                            itemsData[idx_need].warnings = {};
-                            itemsData[idx_need].warnings.resources = {...itemsCloned[idx_need].rules.resources};
-                        }
-                    } else {
-                        itemsData[idx_need] = {...itemsCloned[idx_need]};
-                        itemsData[idx_need].warnings = {};
-                        itemsData[idx_need].warnings.resources = {...itemsCloned[idx_need].rules.resources};
-                    }
-                }
-            }
-
-            const process_slots = (item) => {
-                if (!item.options_data
-                    || item.options_data.ext_pwr === false
-                    || item.options_data.mono_eem === false
-                )
-                    return item.slotOccupied;
-                else if (item.options_data.ext_pwr === true)
-                    return 0;
-                else if (item.options_data.mono_eem === true || item.options_data.n_eem === "1 EEM")
-                    return 1;
-                else if (item.options_data.n_eem === "3 EEM")
-                    return 3;
-
-                return item.slotOccupied;
-            }
-
-            nbUsedSlot = slots
-                .filter(item => item.type !== 'idc-bnc')
-                .reduce((prev, next) => {
-                    return prev + process_slots(next);
-                }, 0);
-
-            nbrCurrentClock = slots
-                .reduce((prev, next) => {
-                    return next.type === 'clocker' ? prev + ((next.options_data && next.options_data.ext_clk === true) ? 0 : next.clockOccupied) : prev;
-                }, 0);
-
-            if (idx in itemsData) {
-                itemsData[idx].nbrCurrentSlot = nbUsedSlot;
-                itemsData[idx].nbrCurrentClock = nbrCurrentClock;
-                if (!('warnings' in itemsData[idx])) {
-                    itemsData[idx].warnings = {};
-                }
-            } else {
-                itemsData[idx] = {...itemsCloned[idx]};
-                itemsData[idx].nbrCurrentSlot = nbUsedSlot;
-                itemsData[idx].nbrCurrentClock = nbrCurrentClock;
-                itemsData[idx].warnings = {};
-            }
-
-            if (nbUsedSlot > itemsCloned[idx].nbrSlotMax) {
-                if (itemsCloned[idx].rules.maxSlot.message) {
-                    rules[itemsCloned[idx].rules.maxSlot.type] = {...itemsCloned[idx].rules.maxSlot};
-                }
-                itemsData[idx].warnings.maxSlotWarning = {...itemsCloned[idx].rules.maxSlotWarning};
-            }
-
-            if (nbrCurrentClock > itemsCloned[idx].nbrClockMax) {
-                rules[itemsCloned[idx].rules.maxClock.type] = {...itemsCloned[idx].rules.maxClock};
-                itemsData[idx].warnings.maxClockWarning = {...itemsCloned[idx].rules.maxClockWarning};
-            }
-
-            if (itemsCloned.length > (idx + 1)) {
-                const ddkali = itemsCloned[idx + 1];
-                if (ddkali.type === 'kasli' || ddkali.type === 'vhdcicarrier') {
-                    rules[ddkali.rules.follow.type] = {...ddkali.rules.follow};
-                }
-            }
-        }
-
-        if (idxK.length === 0) {
-            const slots_need_resource = itemsCloned.slice(0);
-            const idx_need = slots_need_resource.findIndex(e => (e.rules && e.rules.resources));
-
-            if (idx_need != -1) {
-                if (idx_need in itemsData) {
-                    if ('warnings' in itemsData[idx_need]) {
-                        itemsData[idx_need].warnings.resources = {...itemsCloned[idx_need].rules.resources};
-                    } else {
-                        itemsData[idx_need].warnings = {};
-                        itemsData[idx_need].warnings.resources = {...itemsCloned[idx_need].rules.resources};
-                    }
-                } else {
-                    itemsData[idx_need] = {...itemsCloned[idx_need]};
-                    itemsData[idx_need].warnings = {};
-                    itemsData[idx_need].warnings.resources = {...itemsCloned[idx_need].rules.resources};
-                }
-            }
-        }
-
-
-        // check number of clock connector available
-        const idxC = itemsCloned.reduce((prev, next, i) => {
-            if (next.type === 'kasli' || next.type === 'clocker') {
-                prev.push(i);
-            }
-            return prev;
-        }, []);
-        for (let i = 0; i <= idxC.length - 1; i++) {
-            let slots;
-            let nbrCurrentClock = 0;
-            let idx = idxC[i];
-
-            if (i !== idxC.length - 1) {
-                slots = itemsCloned.slice(idx + 1, idxC[i + 1]);
-            } else {
-                slots = itemsCloned.slice(idx + 1);
-            }
-
-            nbrCurrentClock = slots.reduce((prev, next) => {
-                return prev + ((next.options_data && next.options_data.ext_clk && next.options_data.ext_clk.checked) ? 0 : next.clockOccupied);
-            }, 0);
-
-            if (idx in itemsData) {
-                if (itemsData[idx].nbrCurrentClock && itemsData[idx].type !== "clocker") {
-                    itemsData[idx].nbrCurrentClock += nbrCurrentClock;
-                } else {
-                    itemsData[idx].nbrCurrentClock = nbrCurrentClock;
-                }
-            } else {
-                itemsData[idx] = {...itemsCloned[idx]};
-                itemsData[idx].nbrCurrentClock = nbrCurrentClock;
-                itemsData[idx].warnings = {};
-            }
-
-            if (nbrCurrentClock > itemsCloned[idx].nbrClockMax) {
-                rules[itemsCloned[idx].rules.maxClock.type] = {...itemsCloned[idx].rules.maxClock};
-                itemsData[idx].warnings.maxClockWarning = {...itemsCloned[idx].rules.maxClockWarning};
-            }
-        }
-
-
-        if (itemsCloned.find(elem => elem.type === 'urukul')) {
-            if (this.state.items['urukul'].rules.info) {
-                rules[this.state.items['urukul'].rules.info.type] = {...this.state.items['urukul'].rules.info};
-            }
-        }
-
-
-        // check if IDC-BNC is correctly positionned (after Zotino or HD68)
-        const idxIDCBNC = itemsCloned.reduce((prev, next, i) => {
-            if (next.type === 'idc-bnc') {
-                prev.push(i);
-            }
-            return prev;
-        }, []);
-        for (var i = idxIDCBNC.length - 1; i >= 0; i--) {
-            const ce = idxIDCBNC[i];
-            let shouldWarning = false;
-
-            if (ce == 0) {
-                shouldWarning = true;
-            } else if (ce >= 1) {
-                const pe = idxIDCBNC[i] - 1;
-                if (itemsCloned[pe].type !== 'zotino' &&
-                    itemsCloned[pe].type !== 'hd68' &&
-                    itemsCloned[pe].type !== 'idc-bnc') {
-                    shouldWarning = true;
-                }
-            }
-
-            if (shouldWarning) {
-                itemsData[ce] = {...itemsCloned[ce]};
-                itemsData[ce].warnings = {};
-                itemsData[ce].warnings.wrong = {...itemsCloned[ce].rules.wrong};
-            }
-        }
-
-
-        // check number of IDC-BNC adapters for a Zotino and HD68-IDC
-        const idxZH = itemsCloned.reduce((prev, next, i) => {
-            if (next.type === 'zotino' || next.type === 'hd68') {
-                prev.push(i);
-            }
-            return prev;
-        }, []);
-        for (let i = 0; i <= idxZH.length - 1; i++) {
-            let slots;
-            let nbUsedSlot = 0;
-            let idx = idxZH[i];
-
-            if (i !== idxZH.length - 1) {
-                slots = itemsCloned.slice(idx + 1, idxZH[i + 1]);
-            } else {
-                slots = itemsCloned.slice(idx + 1);
-            }
-
-            let stopCount = false;
-            nbUsedSlot = slots.reduce((prev, next, ci, ca) => {
-                if (ci === 0 && next.type === 'idc-bnc') {
-                    return prev + 1;
-                } else if (ca[0].type === 'idc-bnc' && ci > 0 && ca[ci - 1].type === 'idc-bnc') {
-                    if (next.type !== 'idc-bnc') { stopCount = true; }
-                    return prev + (next.type === 'idc-bnc' && !stopCount ? 1 : 0);
-                }
-                return prev;
-            }, 0);
-
-            if (idx in itemsData) {
-                itemsData[idx].nbrCurrentSlot = nbUsedSlot;
-                if (!('warnings' in itemsData[idx])) {
-                    itemsData[idx].warnings = {};
-                }
-            } else {
-                itemsData[idx] = {...itemsCloned[idx]};
-                itemsData[idx].nbrCurrentSlot = nbUsedSlot;
-                itemsData[idx].warnings = {};
-            }
-
-            if (nbUsedSlot > 0) {
-                if (itemsCloned[idx].rules.maxSlot.message) {
-                    rules[itemsCloned[idx].rules.maxSlot.type] = {...itemsCloned[idx].rules.maxSlot};
-                }
-            }
-            if (nbUsedSlot > itemsCloned[idx].nbrSlotMax) {
-                itemsData[idx].warnings.maxSlotWarning = {...itemsCloned[idx].rules.maxSlotWarning};
-            }
-
-            // check if HD68-IDC has at least 1 IDC-BNC adapter
-            if (itemsCloned[idx].type === 'hd68') {
-                let shouldWarning = false;
-
-                if (idx < itemsCloned.length - 1) {
-                    if (itemsCloned[idx + 1].type !== 'idc-bnc') {
-                        shouldWarning = true;
-                    }
-                } else if (idx === itemsCloned.length - 1) {
-                    shouldWarning = true;
-                }
-
-                if (shouldWarning) {
-                    if (idx in itemsData) {
-                        itemsData[idx].warnings.minAdapter = {...itemsCloned[idx].rules.minAdapter};
-                    } else {
-                        itemsData[idx] = {...itemsCloned[idx]};
-                        itemsData[idx].warnings = {};
-                        itemsData[idx].warnings.minAdapter = {...itemsCloned[idx].rules.minAdapter};
-                    }
-                }
-            }
-        }
-
         // update state with rules
         this.setState({
             ...this.state,
@@ -765,7 +495,7 @@ export class Shop extends PureComponent {
                 ...this.state.columns,
                 cart: {
                     ...this.state.columns.cart,
-                    itemsData: itemsData,
+                    itemsData: itemsCloned,
                 }
             },
             rules: {
diff --git a/static/js/shop/Warnings.jsx b/static/js/shop/Warnings.jsx
index 1a8bb0c..f3849f2 100644
--- a/static/js/shop/Warnings.jsx
+++ b/static/js/shop/Warnings.jsx
@@ -1,9 +1,10 @@
 import {OverlayTrigger} from "react-bootstrap";
 import React from "react";
-
+import {MaxLevel} from "./warnings";
 
 
 export function Warnings({warnings}) {
+    const max_level = MaxLevel(warnings);
     return (
         <OverlayTrigger
             placement="bottom"
@@ -11,15 +12,18 @@ export function Warnings({warnings}) {
             overlay={
                 ({arrowProps, hasDoneInitialMeasure, show, ...props}) => (
                     <div className="k-popup-warning" {...props}>
-
-                        <p className="rule warning">
-                            <i>{warnings.message}</i>
-                        </p>
+                        {warnings.map((warning, _i) => {
+                            return (
+                                <p className="rule warning">
+                                    <i>{warning.message}</i>
+                                </p>
+                            )
+                        })}
                     </div>)
             }
             rootClose
         >
-            <img className="alert-warning" src={`/images${warning.icon}`}/>
+            <img className="alert-warning" src={max_level.icon}/>
         </OverlayTrigger>
     )
 }
\ No newline at end of file
diff --git a/static/js/shop/count_resources.js b/static/js/shop/count_resources.js
index ff39334..f80bc0a 100644
--- a/static/js/shop/count_resources.js
+++ b/static/js/shop/count_resources.js
@@ -1,5 +1,5 @@
 
-export const count_item_occupied_eem = (item) => {
+const count_item_occupied_eem = (item) => {
     if (!item.options_data
         || item.options_data.ext_pwr === false
         || item.options_data.mono_eem === false
@@ -15,49 +15,38 @@ export const count_item_occupied_eem = (item) => {
     return item.slotOccupied || 0;
 }
 
-export const count_item_occupied_clock = (item) => {
+const count_item_occupied_clock = (item) => {
     return (item.options_data && item.options_data.ext_clk === true) ? 0 : (item.clockOccupied || 0);
 }
 
-export const count_item_occupied_idc = (item) => {
+const count_item_occupied_idc = (item) => {
     return item.idcOccupied || 0;
 }
 
-function EEMCounter(data, index) {
-    let count = 0;
-    for (let i = index + 1; i < data.length; i++) {
-        if (!!data[i].resources.find((value, _i) => value.name === "eem")) break;
-        count += count_item_occupied_eem(data[i]);
-    }
-    return count;
+export const item_occupied_counters = {
+    "eem": count_item_occupied_eem,
+    "clk": count_item_occupied_clock,
+    "idc": count_item_occupied_idc,
 }
 
-function ClockCounter(data, index) {
-    let count = 0;
-    for (let i = index + 1; i < data.length; i++) {
-        if (!!data[i].resources.find((value, _i) => value.name === "clk")) break;
-        count += count_item_occupied_clock(data[i]);
+function CounterFactory(name) {
+    return (data, index) => {
+        let count = 0;
+        for (let i = index + 1; i < data.length; i++) {
+            if (data[i].resources && !!data[i].resources.find((value, _i) => value.name === name)) break;
+            count += item_occupied_counters[name](data[i]);
+        }
+        return count;
     }
-    return count;
 }
 
-function IDCCounter(data, index) {
-    let count = 0;
-    for (let i = index + 1; i < data.length; i++) {
-        if (!!data[i].resources.find((value, _i) => value.name === "idc")) break;
-        count += count_item_occupied_idc(data[i]);
-    }
-    return count;
-}
-
-
 const resource_counters = {
-    "eem": EEMCounter,
-    "clk": ClockCounter,
-    "idc": IDCCounter
+    "eem": CounterFactory("eem"),
+    "clk": CounterFactory("clk"),
+    "idc": CounterFactory("idc")
 }
 
-export function CountResources(data, index) {
+function CountResources(data, index) {
     if (!data[index].resources) return null;
     let result = [];
     data[index].resources.forEach((item, _) => {
@@ -68,4 +57,11 @@ export function CountResources(data, index) {
         });
     });
     return result;
+}
+
+export function FillResources(data) {
+    return data.map((element, index) => {
+        element.counted_resources = CountResources(data, index);
+        return element;
+    })
 }
\ No newline at end of file
diff --git a/static/js/shop/options/Options.jsx b/static/js/shop/options/Options.jsx
index 8364792..0993770 100644
--- a/static/js/shop/options/Options.jsx
+++ b/static/js/shop/options/Options.jsx
@@ -1,3 +1,4 @@
+import React from "react";
 import {apply as json_logic_apply} from "json-logic-js";
 import {componentsList} from "./components/components";
 import {true_type_of} from "./utils";
diff --git a/static/js/shop/warnings.js b/static/js/shop/warnings.js
index 6a7b662..907301f 100644
--- a/static/js/shop/warnings.js
+++ b/static/js/shop/warnings.js
@@ -5,11 +5,11 @@
  * Second - resources indicator should be separate component
  */
 
-import {count_item_occupied_eem, count_item_occupied_clock, count_item_occupied_idc} from "./count_resources";
+import {item_occupied_counters} from "./count_resources";
 
 const Levels = {
-    "reminder": {priority: 0, icon: '/images/shop/icon-reminder.svg'},
-    "warning": {priority: 1, icon: '/images/shop/icon-warning.svg'},
+    "reminder": {priority: 1, icon: '/images/shop/icon-reminder.svg'},
+    "warning": {priority: 2, icon: '/images/shop/icon-warning.svg'},
 }
 
 const find_in_counters = (counters, name) => {
@@ -17,7 +17,15 @@ const find_in_counters = (counters, name) => {
 }
 
 const find_previous_source = (data, index, source) => {
-    return data.slice(0, index).find((element) => {element.resources.find((value) => value.name === source)})
+    return data.slice(0, index).find((element) => {
+        return element.resources && find_in_counters(element.resources, source)
+    })
+}
+
+const find_next_source_index = (data, index, source) => {
+    return data.slice(index + 1).findIndex((element) => {
+        return element.resources && find_in_counters(element.resources, source)
+    }) + index + 1
 }
 
 const not_enough_resource_trigger = (name) => {
@@ -29,20 +37,31 @@ const not_enough_resource_trigger = (name) => {
 
 const no_source_trigger = (name) => {
     return (data, index, _counters) => {
-        const occupied = count_item_occupied_eem(data[index]);
+        const occupied = item_occupied_counters[name](data[index]);
         if (occupied > 0)
-            return !!find_previous_source(data, index, name);
+            return !find_previous_source(data, index, name);
         return false;
     }
 }
 
+const wiring_constraint = (name) => {
+    return (data, index, _counters) => {
+        const next = find_next_source_index(data, index, name);
+        return next - index === 1;
+    }
+}
+
+const crate_overload = (data, index, _counters) => {
+    // TODO
+}
+
 const Types = {
     "eem_resource": {
         level: "warning",
         trigger: not_enough_resource_trigger("eem"),
         message: "Insufficient EEM connectors"
     },
-    "no_eem_source" : {
+    "no_eem_source": {
         level: "warning",
         trigger: no_source_trigger("eem"),
         message: 'This card needs a card that provides a EEM connector (e.g. Kasli) at its left.'
@@ -52,7 +71,7 @@ const Types = {
         trigger: not_enough_resource_trigger("idc"),
         message: "Insufficient IDC connectors."
     },
-    "no_idc_source" : {
+    "no_idc_source": {
         level: "warning",
         trigger: no_source_trigger("idc"),
         message: 'Should be after a Zotino or a HD68-IDC or with another IDC-BNC.'
@@ -62,10 +81,52 @@ const Types = {
         trigger: not_enough_resource_trigger("clk"),
         message: "Insufficient clock connectors."
     },
-    "no_clk_source" : {
+    "no_clk_source": {
         level: "warning",
         trigger: no_source_trigger("clk"),
-        message: 'This card needs either a card that provides a clock source (e.g. Kasli or Clocker) at its left or use external clock source.'
+        message: 'This card needs either a card that provides a clock source (e.g. Kasli or Clocker) at its left or use an external clock source.'
     },
+    "eem_wiring_constraint": {
+        level: "reminder",
+        trigger: wiring_constraint("eem"),
+        message: "Due to wiring constraints, the carrier can only connect to EEM cards immediately at its right, without crossing another carrier."
+    },
+    "crate_overload": {
+        level: "warning",
+        trigger: crate_overload,
+        message: 'This card needs either a card that provides a clock source (e.g. Kasli or Clocker) at its left or use an external clock source.'
+    },
+    "default": {
+        level: "warning",
+        trigger: (_a, _b, _c) => {
+            return true;
+        },
+        message: 'This item has unimplemented warning'
+    }
 }
 
+
+export function TriggerWarnings(data) {
+    return data.map((element, index) => {
+        if (!element.warnings) return element;
+        element.show_warnings = element.warnings
+            .map((warning, _) => {
+                if (!!Types[warning])
+                    return Types[warning].trigger(data, index, element.counted_resources) ? {trigger: undefined, ...Types[warning]} : null;
+                else
+                    return Types.default.trigger(data, index, element.counted_resources);
+            })
+            .filter((warning, _) => {
+                return !!warning
+            });
+        return element;
+    })
+}
+
+export function MaxLevel(warnings) {
+    let mx = {priority: 0, icon: null};
+    for (const warning of warnings) {
+        if (Levels[warning.level].priority > mx.priority) mx = Levels[warning.level];
+    }
+    return mx;
+}
\ No newline at end of file
diff --git a/static/js/shop_data.js b/static/js/shop_data.js
index 7e9d9d5..92fbff2 100644
--- a/static/js/shop_data.js
+++ b/static/js/shop_data.js
@@ -91,38 +91,15 @@ const shop_data = {
             ]
           }
       ],
-      rules: {
-        maxSlot: {
-          type: 'kasli-max-slot',
-          icon: '/shop/icon-reminder.svg',
-          name: 'Kasli',
-          message: 'Insufficient EEM connectors.',
-        },
-        maxSlotWarning: {
-          type: 'kasli-max-slot-warning',
-          icon: '/shop/icon-warning.svg',
-          name: 'Kasli',
-          message: 'Insufficient EEM connectors',
-        },
-        maxClock: {
-          type: 'kasli-max-clock',
-          icon: '/shop/icon-reminder.svg',
-          name: 'Kasli',
-          message: 'Insufficient clock connectors. Kasli has at most 4 clock connections.',
-        },
-        maxClockWarning: {
-          type: 'kasli-max-clock-warning',
-          icon: '/shop/icon-warning.svg',
-          name: 'Kasli',
-          message: 'Insufficient clock connectors.',
-        },
-        follow: {
-          type: 'kasli-follow',
-          icon: '/shop/icon-reminder.svg',
-          name: 'Kasli',
-          message: 'Due to wiring constraints, a Kasli can only connect to EEM cards immediately at its right, without crossing another carrier.',
-        },
-      },
+      resources: [
+        {name: "eem", max: 5},
+        {name: "clk", max: 4},
+      ],
+      warnings: [
+          "eem_resource",
+          "clk_resource",
+          "eem_wiring_constraint"
+      ]
     },
     'kaslisoc': {
       id: 'kaslisoc',
@@ -338,14 +315,9 @@ const shop_data = {
           ]
         }
       ],
-      rules: {
-        resources: {
-          type: 'bnc-dio',
-          icon: '/shop/icon-warning.svg',
-          name: 'BNC-DIO',
-          message: 'This card needs a card that provides a EEM connector (e.g. Kasli) at its left.',
-        },
-      },
+      warnings: [
+        "no_eem_source"
+      ]
     },
     'sma-dio': {
       id: 'sma-dio',
@@ -411,14 +383,9 @@ const shop_data = {
       nbrClockMax: 0,
       slotOccupied: 1,
       clockOccupied: 0,
-      rules: {
-        resources: {
-          type: 'sma-dio',
-          icon: '/shop/icon-warning.svg',
-          name: 'SMA-DIO',
-          message: 'This card needs a card that provides a EEM connector (e.g. Kasli) at its left.',
-        },
-      },
+      warnings: [
+        "no_eem_source"
+      ]
     },
     'mcx-dio': {
       id: 'mcx-dio',