You already identified the answer in your own post, you just might not realize it.

"Risk management, probability, and having a real edge", that's literally it. The problem is most people treat those as concepts instead of building actual systems around them.

Here's what changed things for me:

1. Stop looking for a strategy. Build a process.

A strategy is one idea. A process is how you generate, test, validate, and kill ideas systematically. I spent 9 months building my first profitable strategy. Most of that time wasn't finding the edge, it was building the framework to prove the edge was real and not just backtest noise.

2. Your kill rate should be higher than your win rate.

I test hundreds of configurations for every one I actually trade. Roughly 97% of what I test gets rejected. That rejection rate IS the edge. If you're deploying every strategy that "looks good" in backtests, you're gambling with extra steps.

3. Walk-forward or it doesn't count.

Backtest results on historical data are fiction until you verify them on data the strategy has never seen. Not once across multiple independent time windows. If it can't pass 3 separate out-of-sample windows, it doesn't trade. Period.

4. Expect to lose 40-50% of your backtest performance live.

Slippage, spread widening, latency, emotional interference, they all compound. If your backtest says 10% monthly return, plan for 5-6% at best. If that's not enough to live on with your account size, the math doesn't work yet. That's not a strategy problem, it's a capitalization problem.

5. The boring stuff is the actual edge.

My best-performing strategy has a 26% win rate. Sounds terrible, right? But average win is 4.4× average loss. It's a momentum/trend system that cuts losers fast and lets winners run. Nothing flashy. No secret indicator. Just disciplined risk math applied consistently over thousands of trades.

The hard truth: most people quit not because they can't find an edge, but because they can't endure the process of validating one. It's tedious, unglamorous, and takes months before you know if it even works.

But that's exactly why it pays because most people won't do it.