Previous macd cross

AmiBroker
1

I am trying to create code to Explore for a previous cross of SIGNAL over MACD on daily charts. I got this far which does find the cross for current data:

BuyPrice = 0;
SellPrice = 0;
ShortPrice = Open;
CoverPrice = Open;

Short =
Cross (Signal(),MACD());  

Filter = short;

The plan is to look for that cross on previous days, but I cannot figure out where to place the -1 or -2 to indicate previous bars. I've tried every likely spot, but nothing works.

Thanks.

2 
BuyPrice = 0;
SellPrice = 0;
ShortPrice = Open;
CoverPrice = Open;

Short = Cross (Signal(),MACD());  

NumberOfPreviosBar = 2;
Filter = BarsSince(short) == NumberOfPreviosBar;
3

Thank you awilson. That solved it.

4

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