draw arrows in EA

[jshumaker]

I want to try to count wave patterns in my EA and see the wave counts on the chart.  Do I need to create a custom indicator and attach that indicator to the template file and access the custom indicator in the EA or can I call a function to draw an object on the charts directly from the EA?

I have just started researching how to use PlotIndexSet... functions work but all the code samples I have seen use the OnCalculate function.  Which as far as I can tell, OnCalculate is only for custom indicators and not for EAs.  

 

[Alain Verleyen]

jshumaker:

I want to try to count wave patterns in my EA and see the wave counts on the chart.  Do I need to create a custom indicator and attach that indicator to the template file and access the custom indicator in the EA or can I call a function to draw an object on the charts directly from the EA?

I have just started researching how to use PlotIndexSet... functions work but all the code samples I have seen use the OnCalculate function.  Which as far as I can tell, OnCalculate is only for custom indicators and not for EAs.  

 

From documentation :

These functions can't be used when writing Expert Advisors and Scripts.

So you have either to create Objects directly in your EA or use a Custom indicator.

[jshumaker]

angevoyageur:

From documentation :

So you have either to create Objects directly in your EA or use a Custom indicator.

ObjectCreate(0,"prevHigh",OBJ_ARROW_SELL,0,TimeCurrent(),1.453);    

I added that line to my EA and I do not see the arrows on the chart

[Simon Gniadkowski]

jshumaker:
I added that line to my EA and I do not see the arrows on the chart

Was the value  1.453   on your chart at the time ?   try placing the arrow at Bid or Ask price instead, that is guaranteed to be visible on your chart. 

[jshumaker]

RaptorUK:
Was the value  1.453   on your chart at the time ?   try placing the arrow at Bid or Ask price instead, that is guaranteed to be visible on your chart. 

   ObjectCreate(0,"prevHigh",OBJ_ARROW_SELL,0,TimeCurrent(),m_symbol.Bid());  

still nothing

[Alain Verleyen]

jshumaker:
I added that line to my EA and I do not see the arrows on the chart

Is the value returned by ObjectCreate() equal true or false ?

[Simon Gniadkowski]

jshumaker:
still nothing

Maybe you need to explicitly give it a colour ?

ObjectCreate(0,"prevHigh",OBJ_ARROW_SELL,0,TimeCurrent(),m_symbol.Bid());  
ObjectSetInteger(0, "prevHigh", OBJPROP_COLOR, Yellow);  

[Alain Verleyen]

Ah ok, I understood. Objects are not plotted when backtesting :-D

[Simon Gniadkowski]

angevoyageur:
Ah ok, I understood. Objects are not plotted when backtesting :-D

Maybe not Optimization but aren't they plotted during visual mode ?  I hope they are . . .  but haven't tried.  They are from an Indicator.

[Alain Verleyen]

RaptorUK:
Maybe not Optimization but aren't they plotted during visual mode ?  I hope they are . . .  but haven't tried.  They are from an Indicator.

This limitation does not apply to testing in visual mode.

RTFM ;-)

[Simon Gniadkowski]

angevoyageur:
RTFM ;-)

At least one of us is confused  ;-)