Thank you for attempt on trying to enlighten me Mr. Lighthuman but after looking at that Mr. Barry thing , I feel no more informed.

I like stopping at a fixed percentage because I find it works well for me seeing I bet 7 days a week .
I also use a stop loss , to minimise damage on a bad day.
It manages to show profits each month .

You may very well have an edge & I hope it does not fade on you , but horse racing sometimes has days which cannot be explained why they have horror days so this has to be taken into account if adopting the stratergy you have adopted.

Most punters are ahead at some stage , then continue onwards , only to give it all back & some, so adopting a percentage can help if that is happening.

If you ask the average punter how many winners is he going to pick tomorrow, he would not have a clue on how to answer the question.
That usually sums up the average punter, they dont know when to stop .

If one can say stop at a max of 5 winners , that would be a start.

When doing single win selections.
Thinking one is going to pick another 5 winners after the first 5, is pure gambling, which can be OK if it is viewed as such..

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Cheers.