The purpose of knowledge is to give you enough confidence to invest/participate in a market. The trouble with tools is so few offer any predictive power at all

The purpose of knowledge is to give you enough confidence to invest/participate in a market. The trouble with tools is so few offer any predictive power at all. You just get drowned in data and options. They're all so heavily dependent on context (the important variables often difficult to identify) and survivorship bias that I think their main use is to reassure us to stay on the ride.