The webChartFlag option appears in the list of properties for trend graphs (obj_trendgraph02), as shown in the following image. 
Background styles | Not supported. Except for the bgColor property, none of the background style properties are supported. This includes the properties whose names begin with bg, traceBg, and border. |
Gradients | Gradient fill is not supported, so none of the properties named *GradientStyle, *GradientMode, or *GradientFlag are supported. |
markDefaultSize markScale | Not supported. These default to 6 and No Scale. The markers for each trace can be configured with the traceNMarkStyle/Color properties. |
traceNMarkStyle | The markers for traceN can be enabled by setting traceNMarkStyle > 0 but the shape of the markers (for example, circle, square, triangle) is selected automatically. |
traceNType | Supported types are Line and Bar. Event type is not supported. |
legendWidthPercent legendValueMinSpace | Not supported. The legend (if visible) is sized automatically. |
scrollbarMode/Size zoomEnabledFlag | Not configurable. The scroll and zoom features are always enabled and the scrollbar size is fixed. |
traceFillStyle | Supported values are None and Transparent. All other values (Solid, Gradient, Transparent Gradient) are converted to Transparent |
x/yAxisMajor/MinorDivisions | Not supported. The number of ticks on the x & y axis are selected automatically according to the size of the chart. |
yAxisPostion | Not configurable. The y axis position is always outer-left. |
yAxisAutoScaleVisTracesOnlyFlag | Not configurable, always true. |
x/yAxisFlag x/yAxisThickness | Not configurable. The x and y axes are always visible with a thickness of 1 and 2 pixels, respectively. |
traceGroupNBandedFlag | Not supported. Trace groups are supported but banding within groups is not. |
alert properties (valueHighAlarm*, valueLowAlarm*, valueHighWarning*, valueLowWarning*) | An HTML5-rendered trend chart supports one alert threshold per chart. If more than one alert threshold is enabled, HTML5 rendering will not be used. Also, the alert TraceColor is used only if the traceFillStyle is None. For any other traceFillStyle the alert TraceColor is ignored. The alert TraceStyle, Mark, and MarkColor are ignored. The alarmGlowFlag is not supported. |
webChartNavigatorTrace | If this property is set to a trace number (a value between 1 and the traceCount value) the HTML5-rendered trend chart will display a "time navigator" at the bottom of the chart, just below the x (time) axis. The navigator plots the data for the indicated trace, and highlights the time range that is currently visible in the chart. The highlighted section can be resized or dragged to perform a time zoom or scroll. The navigator is intended to show the user the entire data set and let the user zoom/pan to the time range of interest. By default webChartNavigatorTrace = 0 so the navigator is disabled. |
yAxisAutoScaleVisDataOnlyFlag | If this property is checked the chart will compute the y axis scale according to the min and max y values of the visible data points only. This means that the y axis scale may change as the user changes the visible time range by scrolling or zooming. By default the property is unchecked and the y axis is scaled according to the y values of all of the data points, visible or not. This matches the behavior of the trend graphs. Dashboard builder does not allow the webChartFlag property to be attached to data. This is by design, since the flag's value is expected to be constant. |
LegendY axis autoscalingReset buttonData point groupingtimeShiftAfter zooming or scrolling, the time axis labels may briefly be misaligned or overlap. They should be drawn correctly on the next refresh.The chart's tooltip may overlap the Reset button making it difficult to click the button. Moving the mouse a bit will correct this problem.HTML5 rendering will display all timestamps using the local time zone. This may cause user confusion if the display server is in a different time zone.Performance is affected by the number of traces, trace points, use of trace line shadows, trace line thickness, trace markers, trace fill, and other properties. Performance is also affected by the browser and version, and the CPU speed of the client host system.If any of the chart's graphical properties are changed while the chart is displayed (for example the traceFillStyle property is toggled by means of a checkbox control) the chart is rebuilt in the thin client, which in turn resets the chart's time range (as though the Reset button was clicked).Scrolling: If the mouse is moved below the bottom of the chart while dragging the scrollbar, the scrolling will stop. This is unlike the behavior of other objects, which will continue to scroll until the mouse button is released.Drilldown from trace points: If traceFillStyle is not None (that is, trace fill is enabled) and multiple traces share the same Y axis, then it is not possible to click on a point belonging to traceN if the fill area of a higher numbered trace is drawn over that point.When yAxisLogFlag = 1 and the chart has multiple y axes and traces, some y axis labels may appear rather than numeric values. This is rare.Since HTML5-rendered trend charts do not support legendWidthPercent, the width of each chart's legend will vary according to the trace labels. This makes it difficult to create multiple trend chart instances on the same display whose time axes are all the same length, even if the charts all have the same width. (A single chart in stripchart mode may be more appropriate in those cases).On a touch interface, a swipe will scroll the chart left or right. To move the cursor without scrolling, tap the location to which you want the cursor to move.On a touch interface, a pinch-open gesture in the plot area, scrollbar, or navigator will zoom the chart's range in to the pinched range. A pinch-close gesture will zoom out to the pinched range. The pinch-close operation may be difficult to use. A tap on the Reset button gives a better zoom-out experience.borderPixelslabelMinTabWidthlegendWidthPercentlegendBgGradientModelegendBgGradientColor2legendValueMinSpacemarkDefaultSizemarkScaleModeoutlineColorscrollbarModescrollbarSizezoomEnabledFlagtimeRangeOfHistorytraceBgColortraceBgGradientModetraceBgGradientColor2traceBgImageyAxisAutoScaleVisTracesOnlyFlagyAxisFormatyAxisFlagyAxisPositionyAxisValueLabelsyAxisMajor/MinorDivisionsxAxisFlagxAxisMajorDivisionstraceNValueAlarmStatustraceNValueAlarmStatusTabletraceNValueHistoryFlagtraceGroupNBandedFlagtraceNYAxisGridVisFlagtraceNYAxisMinLabelWidthtraceNYAxisValueLabelstraceNYAxisVisFlagtraceNYAxisAutoScaleModetraceNYAxisValueMintraceNYAxisValueMax