Time of day for pivot points

Hi,

I have been using my Amibroker trading software to create the PP,R1,S1,R2 and S2 pivot points. I have been using 13:00 (GMT) as the start of my day.

I have found the GBPUSD to not really move in a predictable way between these lines. This makes me wonder whether the pivot points are traditionally created from a different time of day???

Does anyone have any thoughts on this?

Thanks, Andy

I believe most pivot points are established aroung 10gmt or 11gmt that would be 5pm or 6pm eastern time US