Why are the two prices on the contract screen always different? Which one should I watch?
The mark price is the price the exchange uses to calculate unrealized P&L and determine liquidations.
Key point: When setting a stop-loss, think carefully about which price should trigger it. The last price is more sensitive, while the mark price is less likely to trigger accidentally due to a price spike.
Back to the chart: $BTC is at 80598.59 (24h +5.13%).
Leverage magnifies gains and losses, not the accuracy of your decisions. The higher the leverage, the less room you have for mistakes.