[amibroker] Average: barssince, cum(1), sum ??

[donna girardin <dmarval@xxxxxxxx>]

Hi everyone,
 
I’m new to AB and am having trouble determining the code concepts of the AFL language.  What I’m trying to code is a simple math function, but no matter how many different variables I use, I can’t get it J. I have tried using functions of barssince, cum(1), sum, = =, y !=, ++y, but I can’t put any of it together to obtain my value.
 
I’m trying to obtain the average value for my code:
 
PPO = (EMA(C,20)-EMA(C,50)) / EMA(C,50);
 
What I want to do is; 
 
sum value, over my time frame -- x =250 days,  that PPO was above .15 then divide the sum value by the total # of count days (bars),over my time frame -- x =250 days, that PPO was above .15. Hence my average.
 
Is there anyone that can help me?
 
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