I am experimenting with SAR() but I want it to apply to a longer TimeFrame.

For example, if my BarPeriod is 15, I want to look at the SAR for hourly.

I tried the below, but TimeFrame doesn't seem to affect SAR() at all. Is there any way to simulate a wider timeframe by supplying a different input to SAR() ?
Code:
function run() 
{
	StartDate = 20140206;
	EndDate = 20140212;
	BarPeriod = 15;
	
	TimeFrame = 4;	
	vars Price = series(price());
	var sar = SAR(0.02,0.2);
	plot("SAR",sar,DOT,RED);
	TimeFrame = 1;
}