I Need Explanation Urgently

1)Can any body out there help explain where to take my reading(i.e high,low,close) on monday when calculating my pivotpont calculation as day trader.should it be from 00.00gmt -20.00gmt on friday or 21.00gmtthursday-2000gmt on friday?
2)which platform or brokers offers 1 or 2 pip spread.

oanda offers i think 1.5 spread on EURUSD.

According the to school here, you average the high, low & close to get your pivot point. How to Caluclate Pivot Points

I’m not sure about the timing, but I’d have to assume that is based on the time interval for whatever chart you decided to use.