how to i build a indicator with flexible Parameter

derekcheah · **Joined:** Fri Sep 02, 2011 2:24 pm **Posts:** 4

hi,
i would like to buld a indicator to create buying price,
my current indicator calculation is Hight[i] +0.0002(spreat)+0.0001(break through)
how can i program the signal= Hight[i] + parameter + 0.0001 ?
thank for reply

molanisfx · **Joined:** Tue Dec 22, 2009 12:22 am **Posts:** 1761

If you want to get the spread, you could add:
(Ask - Bid)*0.0002
Mind you, it will work in forward testing but may fail or won't give you all signals in backtesting. Why? The historical data for backtesting is made of open,high,low and close; and not every tick. So in backtesting it will try to come up with a spread based on Ask (open) - Bid (open).. or close, high, low
Lots of indicators on internet use Ask and Bid, but only a few people understand the implications in backtesting

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how to i build a indicator with flexible Parameter