Most traders don't blow up from bad entries. They blow up from bad MATH.
3 numbers decide if you survive this market.
1-Position size — risk 1-2% max, not "whatever feels right"
2-Funding rate — 0.05%/8h = silent daily bleed on perps
3-Break-even price — fees + funding quietly move your real entry
I wrote the full breakdown with exact formulas + worked examples:

5 min read. Could save your next position.