Machine learning was in fashion in the late 1980s when I was in graduate school. I remember professsors thinking that they will become too rich with ML.When they lost their money they got around understanding that its principles apply to problems that require curve-fitting, which is exactly the opposite of what you need in trading. You will meet many in forums who think they can do confidence intervals and solve the problems. Those are usually paper traders. Read just the introduction to this blog.
This is the best analysis that debunks ML.
Curve fitting is desirable and necessary. Strategies can't exist ......without fitting buy and sell signals to price data to maximize a fitness function's measure of an Equity Curve.
Curve fitting is a good thing, not a bad thing.
