Subject: Re: Chart: timing with Nas100 RS screen
I've been doing my trades on the last day of the month for quite a while. It's a PITA most of the time. Especially if you are running multiple monthly screens.
You have to run all your screens overnight in the middle of the week, with no time to think about things and it consumes your leisure time for that night.

For bookkeeping all the monthly account/portfolio balances I've always treated a month to end on the last Friday of the month. For a couple you can easily have 6-8 accounts between the two of you.

It's just a lot simpler to align the trading month the same way.

If you are trading with a GTR1 backtested screen, its 21 day cycle does not line up with calendar months anyway. Close, but not exact.