Hi Clive, Oh dear, I remember the ZX Spectrum. Never had one, just a Trash80 Model 1 as the first owned computer. Used a friend's Altair and later CPM machine. Boot tapes, ugh.
Anyway, the download worked without signing in.
You are right, a strange worksheet. Columns N, P, and AA all give different results with the B/H (P) the winner it looks like so this might not be a good approach. I'll have to look at it some more with other stocks to see what happens then. Not every position is a good fit for AIM and backtesting does not always tell us this.
Best,
Allen
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