title: Zingchart - some points are hidden in the graph
body: <p>I use Zingchart to plot some log Data therefore I need to display every single point in the graph. I activated the points attribute in the json(see </p>
  
  <p><div class="snippet" data-lang="js" data-hide="true" data-console="false" data-babel="false">
  <div class="snippet-code snippet-currently-hidden">
  <pre class="snippet-code-js lang-js prettyprint-override"><code>$scope.graphoptions = {
              theme:"dark",
              "gui":{
                behaviors:[]
              },
  
              globals: {
                shadow: false,
                fontFamily: "Helvetica"
              },
              type: "line",
              plot: {
                aspect: "segmented",
                marker: {}
              },
              "legend":{
                margin :"5% 88%",
                layout: "float",
                fontSize : "10px",
                backgroundColor: "#888888",
                borderColor : "#000000",
                shadowColor : "transparent",
                toggleAction: "hide",
                item: {
                  markerStyle : "circle",
                  fontColor: "#ffffff"
                },
              },
              scaleX: {
                zooming: true,
                item: {
                  fontColor: "white"
                },
                guide: {
                  visible: false
                },
                "transform": {
                  "type": "date",
                  "all": "%G:%i",
                }
              },
  
              "scaleY": {
                zooming:true,
                lineColor : "#DDD",
                tick : {
                  lineColor : "#DDD"
                },
                item : {
                  fontColor : "#DDD"
                },
                refLine : {
                  lineColor : "#DDD"
                },
              },
  
              tooltip : {
                //we have to store the tooltip fkt globally so its ouside angulars
                //scope thatswhy we have to pass the data to the function
                jsRule : "applyTooltip("+$scope.fileName+")",
                shadow:false
              },
  
              plotarea: {
                "adjust-layout":true,
                backgroundColor : '#272822'
              },
            }</code></pre>
  </div>
  </div>
  </p>
  
  <p>for full json).</p>
  
  <p>As you can see in this screenshot <a href="https://i.stack.imgur.com/6B2iE.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/6B2iE.png" alt="graph without zoom"></a> </p>
  
  <p>Some points of the read Graph are drawn but none of the blue one.
  When I zoom in:</p>
  
  <p><a href="https://i.stack.imgur.com/EQKXR.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/EQKXR.png" alt="Graph with Zoom"></a></p>
  
  <p>Some markers of the Blue graph are displayed. 
  Is this a bug or do I have to activate an other attribute in the json I am not aware of.</p>
  
  <p>Thanks in advance! </p>