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How can I dispatch an event from my custom indicator?
mese79
 Post subject: How can I dispatch an event from my custom indicator? Post rating: 0   New post Posted: Wed 22 Jul, 2020, 15:19 

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Location: United Arab Emirates, Dubai
Hi
I have an almost heavy-calculation indicator that i want to use it in a strategy. for my indicator starting candle is important so in my strategy OnBar event, every time i have to recalculate from the beginning of given period.
I also add my indicator to chart at OnStart, but that wouldn't give me indicator results(
chart.add(x)
).
So I wonder is it possible to fire an event from my indicator and handle that event from my strategy once I add my indicator to the chart?
 
API Support
 Post subject: Re: How can I dispatch an event from my custom indicator? Post rating: 1   New post Posted: Thu 23 Jul, 2020, 10:58 
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Joined: Fri 31 Aug, 2007, 09:17
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Greetings.

Strategy can wait until indicator values will be calculated after adding indicator to chart.
The example is in the strategy attached AddIndicatorToChart.java.

Regards.


Attachments:
AddIndicatorToChart.java [1.93 KiB]
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mese79
 Post subject: Re: How can I dispatch an event from my custom indicator? Post rating: 0   New post Posted: Thu 23 Jul, 2020, 15:22 

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Thanks for reply.
But does this way works for running strategy on live streaming data?
I mean onStart method would be called once at the begining, right? so as new candles come in, calculate method of the used indicator won't get called for new data, i guess.
 
API Support
 Post subject: Re: How can I dispatch an event from my custom indicator? Post rating: 0   New post Posted: Wed 09 Sep, 2020, 10:08 
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Indicator on chart will be recalculated when new candle come in.
Strategy can wait until value for new candle will be available in onBar() method by analogy with code in onStart() - see previous example AddIndicatorToChart.java
Also, strategy can calculate indicator synchronously by calling one of IIndicators.calculateIndicator() methods.
 
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