[amibroker] Sell signal help please

["gosub283" <gosub283@xxxxxxxxx>]

I am attempting to sell on the fist occurance of
a "lower high" that occurs after a minimum hold period.
The code below does not present errors, however
the sell signals materialize a lot later expected and
at unusual times.
Can anyone offer some guidance to help me achieve my objective?

Thanks kindly,
Gosub283
================================================

//Here's a snippet showing my SELL code.

HoldPeriod = 5;

//SELL RULES(S)
Sell = False; // sell only after 'n' bars

//How many days since a buy occured ?
DayCount = BarsSince(Buy==1);

//Sell when DayCount exceeds the hold period and todays close <
yesterday's
Sell = DayCount > (HoldPeriod-1) AND High < Ref(High,-1);





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