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The week's question
In March 2025, in the thread "Re: OT, out", Umm asked the members: "Do you think it is because America is made up of magical soil that makes businesses based in America magically profitable?" This week it is put to everyone again. The button below opens the small thread re-asking it - read what others have said so far, then give your own answer as an ordinary reply.
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Investment Strategies / Mechanical Investing
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Author: rayvt ✧☼🐝🐝  😊 😞
Number: of 6243 
Subject: Re: Chart: timing with Nas100 RS screen
Date: 06/29/26 8:37 PM
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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.
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This community has written 6,227 posts about Mechanical Investing. The article-length ones it recommended most:
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