[amibroker] System based on time

[normanjade]

I am having real problems with coding a simple system based on time. I
have intraday 15 minute data on my chart. The system backtesting
settings is at 15 minutes. I check my bars and I see 14:25 etc. I want
a simple system now. When time is 1425 buy, when time is 1525 sell.
I code it as buy = timenum()==142500 and sell == timenum()==152500..
Nothing. No signals..If I put timenum()>142500 I get signals. But not
with the equal. Anyone know whats wrong here?