diff --git a/lib/torque/provider/internal.js b/lib/torque/provider/internal.js
index 467efd0..df8401b 100644
--- a/lib/torque/provider/internal.js
+++ b/lib/torque/provider/internal.js
@@ -22,7 +22,6 @@ var internal = function (options) {
         [Number.MAX_VALUE, Number.MAX_VALUE],
         [Number.MIN_VALUE, Number.MIN_VALUE]
     ];
-
 };
 
 
@@ -34,46 +33,111 @@ internal.prototype = {
                 this.timestampType = "number";
             }
         } else {
+            time = new Date(Date.parse(time));
             if (this.timestampType === undefined) {
                 this.timestampType = "date";
             }
         }
         this.points.push({lat: parseFloat(lat), lon: parseFloat(lon), time: time, value: parseFloat(value) || value});
     },
-    getBounds: function() {
+    getBounds: function () {
       return this.options.bounds;
     },
+    getCategories: function () {
+        if (!this.options.countby) {
+            return [];
+        }
+
+        var self = this;
+
+        var checkCategoryExists = function (category) {
+            return category.name == self.points[i].value;
+        };
+
+        var categories = [];
+        for (var i = 0; i < this.points.length; i++) {
+            if (!categories.some(checkCategoryExists)) {
+                var randomColor = 0x1000000 + Math.floor(Math.random() * 0xffffff);
+                randomColor = "#" + randomColor.toString(16).slice(1, 7);
+                categories.push({
+                    value: this.points[i].value,
+                    name: this.points[i].value,
+                    color: randomColor
+                });
+            }
+        }
+
+        return categories;
+    },
+    setOptions: function(opt) {
+      var refresh = false;
+
+      if (opt.resolution !== undefined && opt.resolution !== this.options.resolution) {
+        this.options.resolution = opt.resolution;
+        refresh = true;
+      }
+
+      if (opt.steps !== undefined && opt.steps !== this.options.steps) {
+        this.setSteps(opt.steps, { silent: true });
+        refresh = true;
+      }
+
+      if (opt.column !== undefined && opt.column !== this.options.column) {
+        this.options.column = opt.column;
+        refresh = true;
+      }
+
+      if (opt.countby !== undefined && opt.countby !== this.options.countby) {
+        this.options.countby = opt.countby;
+        refresh = true;
+      }
+
+      if (opt.data_aggregation !== undefined) {
+        var c = opt.data_aggregation === 'cumulative';
+        if (this.options.cumulative !== c) {
+          this.options.cumulative = c;
+          refresh = true;
+        }
+      }
+
+      if (refresh) {
+          this.reload();
+      }
+
+      return refresh;
+    },
     setReady: function (ready) {
         if (ready == false) {
             this._ready = false;
         } else {
             var self = this;
 
+            this.options.data_steps = this.points.length;
+
             this.points.sort(function (point1, point2) {
-                if (self.timestampType == "number") {
-                    return point1.time - point2.time;
-                } else {
-                    if (typeof(point1.time) == "string") {
-                        return new Date(point1.time) - new Date(point2.time);
-                    } else {
-                        return point1.time - point2.time;
-                    }
-                }
+                return point1.time - point2.time;
             });
 
-            if (this.timestampType == "date") {
-                this.timestamps = {};  // {date: timestamp_id}
-                var timestampIdx = 0;
-                for (var i = 0; i < this.points.length; i++) {
-                    var point = this.points[i];
-                    this.timestamps[point.time] || (this.timestamps[point.time] = timestampIdx++);
+            if (this.timestampType == "number") {
+                this.options.start = this.points[0].time;
+                this.options.end = this.points[this.points.length - 1].time;
+            } else {
+                this.options.start = this.points[0].time.getTime();
+                this.options.end = this.points[this.points.length - 1].time.getTime();
+            }
+
+            this.timestamps = {};  // {date: timestamp_id}
+            for (var i = 0; i < this.points.length; i++) {
+                var point = this.points[i];
+                if ((this.options.end - this.options.start) != 0) {
+                    this.timestamps[point.time] || (this.timestamps[point.time] = parseInt(this.getSteps() * (point.time - this.options.start) / (this.options.end - this.options.start)));
+                } else {
+                    this.timestamps[point.time] || (this.timestamps[point.time] = 0);
                 }
             }
-            if (this.timestampType == "number") {
-                this.maxTimestamp = this.points[this.points.length - 1].time;
-            } else {
-                this.maxTimestamp = this.timestamps[this.points[this.points.length - 1].time];
-            }
+
+            this.maxTimestamp = this.timestamps[this.points[this.points.length - 1].time];
+
             this._ready = true;
             this._processQueue();
             this.options.ready && this.options.ready();
@@ -166,14 +230,9 @@ internal.prototype = {
             x[pointIdx] = xInTile;
             y[pointIdx] = yInTile;
 
-            var pointTimestamp;
-            if (this.timestampType == 'date') {
-                pointTimestamp = this.timestamps[point.time];
-            } else {
-                pointTimestamp = point.time;
-            }
+            var pointTimestamp = this.timestamps[point.time];
 
-            if (this.options.cumulative) {
+            if (this.options.cumulative && this.maxTimestamp > 0) {
                 if (accumulatedValues[xInTile] === undefined) {
                     accumulatedValues[xInTile] = [];
                 }
@@ -229,16 +288,25 @@ internal.prototype = {
         };
     },
     getKeySpan: function () {
-         return {
-             start: this.options.start * 1000,
-             end: this.options.end * 1000,
-             step: this.options.step,
-             steps: this.options.steps,
-             columnType: this.timestampType
-         };
+        return {
+            start: this.options.start,
+            end: this.options.end,
+            step: this.options.step || ((this.options.end - this.options.start) / this.getSteps()),
+            steps: this.getSteps(),
+            columnType: this.timestampType
+        };
     },
     getSteps: function () {
         return this.options.steps;
+    },
+    setSteps: function(steps, opt) {
+        opt = opt || {};
+        if (this.options.steps !== steps) {
+            this.options.steps = steps;
+            this.options.step = (this.options.end - this.options.start) / this.getSteps();
+            this.options.step = this.options.step || 1;
+            if (!opt.silent) this.reload();
+        }
     }
 };