I think you have a great idea here. It is true history repeats itself in trading. Chart patterns form and go only to form again. It's more or less a circle. You should know however that many times our decisions are just random guesses and only few tend to be accurate.
The question then becomes what if I can keep a log of very accurate past trading decisions that have yielded in profits, then you're good to go
It maybe cyclical but there could be also divergent in the chart patterns and the formation will be different unless you yourself try to point the graph to what ever outcome or narrative you want.
But with the OP's suggestion, this is old school though, some traditional forecasters usually keeps a log of their trading activity or their prediction so that they can go back and see where it goes wrong so to speak. And maybe you can correct yourself as you need to evolve and learn in order to be successful in this field.