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Andrew
Sum(condition,3);
adds up the number of times the condition is true in a
period of three bars.
So then
Sum(condition,3) == 3;
returns a true value if the sum of the number of times
the condition is true in a period of three bars is
exactly equal to 3.
Regards
ChrisB
--- Andrew Z <wizard@xxxxxxxxxxxxxxx> wrote:
> Hey all,
>
> I'm still getting my head around all this AFL code,
> so bear with me :-)
>
> Take the following code:
>
> Buy=Cross(C,EMA(C,20)) AND C < 10;
> BuyPrice=Open;
> Sell=Sum(Open > ValueWhen(Buy,BuyPrice,1),3)==3;
>
> This last line has me a little perplexed. ValueWhen
> returns the value of
> BuyPrice (which is the Open) on the day the Buy
> condition was true. What
> I don't get is how the Sum comes into it and how the
> Sell is triggered.
>
> Thanks,
> Andrew.
>
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