EMAIL I JUST GOT:

I really wish I could discover a way to accurately predict when doubles will hit next. I would then play them all for 22.50 (all 90 doubles played for 0.25 cents). 

MY RESPONSE: 

You be better off tracking the 52 numbers; they hit more often. I am actually thinking of having a separate calendar where I only track the 52 numbers. On this calendar I will put an X over each day that the 52 numbers did NOT hit. There will be more Xs on this calendar then the regular calendar tracking all 85 numbers. I am thinking that  seeing all those Xs will give me a good idea of when one of the 52 numbers will hit next.  

This is a much better use of your time than tracking doubles.