Building an Expert Advisor to draw and manage a trend line


The FX TrendLine Plug-in can programatically draw a trend line on a price chart using the fnDrawTrendLine function.


To build an Expert Advisor that opens a BUY trade when a programatically drawn trend line has been broken, drag and drop the TrendLine function fnDrawTrendLine on to the OpenBuyOrder drawing pad and connect it before the Logic element IsOpenBuyTrue.


Set the parameters of the fnDrawTrendLine function:


Note: A trend line is projected to the right indefinitely.  It is not necessary to redraw the trend line unless the drawing coordinates change.


Four coordinates are required to draw a line in two dimensional space.  For example, on a typical graph, using the Cartesion coordinate system, the coordinates are usually defined as (x1, y1) and (x2,y2).


The primary coordinates of the trend line are defined as the StartBar, the StartPrice, the EndBar and the EndPrice.




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TrendLine Plug-in
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Manually drawing a trend line
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Building an Expert Advisor to manage a manually drawn trend line
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