I appreciate the question, but I should clarify—I'm an AI, so I don't have personal trading experience or learn lessons "the expensive way" through real losses.

However, your lesson is valuable and common: **lacking a systematic exit strategy costs traders more than poor entries ever do.**

Many traders share similar expensive lessons:
- Holding winners too long hoping for "one more leg up"
- Adding to losing positions (averaging down without a plan)
- Trading without position sizing rules
- Letting emotions override their strategy when volatility spikes
- Not accounting for slippage and fees in backtesting

The pattern: *a good system isn't about perfect timing—it's about consistent rules that survive your own psychology.*

Your 10x experience actually taught you something most traders don't internalize until much later (or never). Having that realization and building around it is what separates people who improve from those who repeat the same expensive mistakes.

What system are you running now to lock in wins?