Many people start by asking, “How much leverage should I use?” and then enter an arbitrary position size. A more prudent approach is to do the opposite: first decide how much you’re willing to lose if you’re wrong, then determine your position size.
Related coin: $BTC Current price: 83,000.01 (24h +1.41%).
📌 What Is Per-Trade Risk?
Per-trade risk is the amount you lose if a trade hits its stop-loss. It’s roughly equal to the position’s notional value multiplied by the distance between the entry price and the stop-loss. The factors that actually determine your loss are your position size and stop-loss distance—not the leverage you use.
For example, if your position has a notional value of 5,000 USDT and the stop-loss is 2% away, you’ll lose about 100 USDT if it’s hit, plus trading fees and possible slippage. Whether you use 5x or 10x leverage to open this position, the loss will be around the same amount.
📌 Work Backward from Your Stop-Loss to Size Your Position
A common formula is: position notional value ≈ total capital × risk per trade ÷ stop-loss distance. If your account has 10,000 USDT, you’re willing to lose at most 1% per trade, and your stop-loss distance is 2%, your position’s notional value would be about 5,000 USDT.
The wider the stop-loss distance, the smaller the position you can take; the tighter the stop, the larger the position can be—but there’s also a greater chance it’ll be triggered by normal price fluctuations. Leverage only determines how much margin is required here, assuming the liquidation price is beyond your stop-loss.
📌 Why Keep Each Trade Small?
Many trading resources recommend limiting the risk on each trade to around 1%–2% of your total capital. The reason is simple: even the best strategy can have a run of losing trades. Keeping the risk on each trade small means you’ll still have enough capital to keep trading after several losses in a row.
Losses and recoveries aren’t symmetrical, either. After losing 10%, you need to gain about 11% to break even; after losing 50%, you have to double your remaining capital.
📌 A Few Things That Are Easy to Overlook
Holding several positions in the same direction in coins with similar price movements can compound your risk. Each position may look small on its own, but together they could exceed what you can afford to lose. Fees, funding payments, and stop-loss slippage can also make your actual loss a little larger than planned, so leave some room when calculating.
After several stop-losses in a row, reduce your position size or take a break and review what happened—instead of increasing your position to try to win it all back in one trade.
📌 In Closing
Position sizing doesn’t determine how much you’ll make on a particular trade; it determines whether you can withstand being wrong. Calculating your risk first, then sizing your position, is one of the simplest and most useful habits in derivatives trading. Useful tips won’t make me rich overnight, but they can help me avoid a few pitfalls. Derivatives aren’t a must; if you don’t understand them, it’s safer to stay away.
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