console.log("store : ");
console.log(store);
console.log("store length :");
console.log(store.data.length);

store :
_data: Ext.apply.create.Class
_model: ()
_modelDefaults: Ext.Object.classify.objectClass
_params: Ext.Object.classify.objectClass
_proxy: Ext.apply.create.Class
_remoteFilter: false
_remoteGroup: false
_remoteSort: false
_storeId: "Indicator_Value"
_syncRemovedRecords: false
config: Ext.Object.classify.objectClass
data: Ext.apply.create.Class
     _autoFilter: true
    _autoSort: true
    _filterRoot: "data"
    _sortRoot: "data"
    all: Array[2]
    config: Ext.Object.classify.objectClass
    dirtyIndices: false
    getKey: (record)
    indices: Object
    initConfig: ()
    initialConfig: Object
    items: Array[2]
    keys: Array[2]
    length: 2
map: Object
__proto__: Ext.util.Collection#constructor
dateFirst: Mon Aug 31 2015 14:47:36 GMT+0200 (Paris, Madrid (heure d’été))
dateLast: Mon Aug 31 2015 15:02:48 GMT+0200 (Paris, Madrid (heure d’été))
emptyNext: false
emptyPrevious: false
eventDispatcher: Ext.apply.create.Class
getEventDispatcher: ()
getId: ()
getObservableId: ()
getUniqueId: ()
graphType: 1
id: "myapp-store-indicator_value-1"
indicatorId: 262
initConfig: ()
initialConfig: Object
initialized: true
managedListeners: Object
observableId: "#myapp-store-indicator_value-1"
period: "H"
removed: Array[0]
titleIndicatorValue: "Duration in FTC"
usedSelectors: Array[1]
__proto__: Object


store length :
14