How to building this filter condition in stockfinder5 : "After the market open ,the price is less than today's first 15min bar's hihg and the price is more than taoday's first 15min bar's low " ?

The following is not specific to a 15 minute time frame. It just checks to see if the current price is less than the high and greater than the low of the first bar of the trading day (if the time frame is daily or less).

'|*****************************************************************|
'|*** StockFinder RealCode Condition - Version 5.0 www.worden.com 
'|*** Copy and paste this header and code into StockFinder *********
'|*** Condition:Inside First Bar
'|******************************************************************
Static FBH As Single
Static FBL As Single
If isFirstBar Then
	FBH = Single.NaN
	FBL = Single.NaN
Else
	If Price.DateValue.TimeOfDay < Price.DateValue(1).TimeOfDay Then
		FBH = Price.High
		FBL = Price.Low
	End If
End If
If Single.IsNaN(FBH) Then
	SetIndexInvalid
Else
	If FBL < Price.Last AndAlso _
		Price.Last < FBH Then
		Pass
	End If
End If

thank you bruce :)

You're welcome.