If you don’t have a backtested trading system to have confidence in, then it doesn’t matter what you do, trade with trend or counter trend, you will consistently or finally go through most part or all of your trading capital.
That's not an answer. People have made millions dollar cost averaging without a back test they used logic. So what's your proof.
They suck at trading. You still haven't justified your assertion that you need a back tested strategy.
Inexperienced Under-capitalized Too aggressive Too timid and numerous other reasons why retailers fail.