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How to create a custom trendline

Updated on 2011-04-30 04:40:10

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I know there is already a build-in trendline in QuantShare. But, I wanted to show you how to create your own using the Custom drawing tools plug-in. I will also show you how to add and create more features for this trend line.


- Select "Tools" then "Custom Drawing Tools".
- Click on "Add", type "MyTrendLine" then click on "Save".
- Type the following formula:

if(Functions.ClickPositions.Length == 0) // No click on the chart -> Exit

PointPosition point1 = Functions.ClickPositions[0]; // First click location
PointPosition point2 = Functions.CursorPosition; // Second click set Mouse cursor
if(Functions.ClickPositions.Length > 1) // There is a second click
point2 = Functions.ClickPositions[1]; // Second click associated with point2
Functions.FinishDrawing(); // Finish drawing after the second click

// Draw line using point1 and point2 locations
LineObj line = Functions.PaneObject.DrawLine("Line1", point1.X, point1.Y, point2.X, point2.Y);

// If point1 Y value is higher than point2 Y value then set the line color to Red
if(point1.Y > point2.Y)
line.Line.Color = Color.Red;
else // Otherwise we set the line color to Green
line.Line.Color = Color.Green;

Adding our trendline to the bookmark panel

- Right click on the Bookmark panel (bar under the menu) then click on "Add Shortcut".
- Select "Drawing Tools", keep "Create a shortcut for an existing..." checked then click on "OK".
- Select "MyTrendLine" item then click on "Load selected item".
- To use the drawing item, simply double click on it then click on a chart.

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