[amibroker] How to code "Take onli first trade of the day"?

["quexos0" <quexos0@xxxxxxxxxxxx>]

I dunno if u guys visit moneytec forums.
Over there they have this "Trendfollowing with Parabolic SAR" thread 
where the guy took the first signal of the day onli.

Now, how do I code the "take onli first signal of the day" part?



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