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Position size first, leverage second

Leverage does not decide how much you can lose. Your stop-loss and position size do. Here is how to size a trade, then check that liquidation sits safely beyond your stop.

By Shawn Wilson, Founder and CEO

Published · 4 min read

Also in Français · Español · Deutsch · اردو

Abstract balance with a heavy block on a narrow pivot, a stop line just below it and a deeper liquidation line far beneath, in slate blue and amber.

Most people meet leverage as a slider on an exchange screen: 2x, 10x, 50x. It looks like the main decision. It is not. The main decision is how much you are willing to lose on one trade, and where your stop-loss sits. Leverage comes after, and it only has one real job.

This article walks through the order we think works: size the position from the stop-loss, then check the liquidation distance, then pick the lowest leverage that fits.

Step 1: decide what one trade may cost you

Start with a fixed amount you accept losing if the trade goes wrong. Many traders use a small share of the account, such as 1%. On a $10,000 account, that is $100.

This number is yours. It should be small enough that a run of losing trades does not end your trading.

Step 2: let the stop-loss set the position size

Your stop-loss is the price where you admit the trade was wrong. Its distance from your entry decides how large the position can be.

The sum is simple:

  1. Risk amount divided by stop distance equals position size.
  2. $100 risk with a stop 5% below entry gives a $2,000 position.
  3. $100 risk with a stop 2% below entry gives a $5,000 position.

Notice what happened. A tighter stop allows a larger position for the same risk. A wider stop forces a smaller one. Leverage has not appeared yet, and your loss at the stop is already fixed at about $100, before fees and slippage.

Step 3: what leverage actually changes

Leverage lets you open that position while posting less of your own money as collateral, called margin. A $5,000 position at 5x needs about $1,000 of margin. At 10x it needs about $500.

It does not change your loss at the stop. That is still about $100. What it changes is how far the price can move against you before the exchange closes the position for you. That is the liquidation distance.

As a rough guide, liquidation sits about 1 divided by the leverage away from your entry. The real figure is closer than this, because exchanges keep a maintenance margin and charge fees. Your exchange shows the exact liquidation price before you confirm. Always read it.

Leverage and rough liquidation distance, before maintenance margin and fees
LeverageApproximate move to liquidation
2xabout 50%
5xabout 20%
10xabout 10%
20xabout 5%
50xabout 2%

Step 4: liquidation must sit well beyond your stop

Here is the rule that ties it together. Your stop-loss must trigger long before liquidation can.

If your stop is 5% away and you choose 20x, liquidation sits at roughly 5%, and in practice a little closer. The exchange may close you out before your stop ever fires. You lose the margin, often plus a liquidation fee, and your carefully chosen stop did nothing.

So the stop distance sets a ceiling. With a 5% stop, 20x is already too much. With a 2% stop, 50x is already too much. Then step well back from that ceiling, because of what comes next.

Why most traders should use very little

Once you size from the stop, high leverage stops looking attractive. It does not let you risk less. It only frees up collateral, and the cost is a liquidation price closer to your entry.

There are plain reasons to keep it low:

  • Slippage. Stops can fill beyond their price. A thin buffer turns slippage into liquidation.
  • Sudden wicks. Brief price spikes can reach a close liquidation price and reverse, closing you out at the worst point.
  • Sizing mistakes. At low leverage, an error in your sums costs a little. At high leverage, it can cost the whole margin.
  • Ongoing costs. Leveraged positions can carry fees that add up while the trade is open. Check your exchange's fee schedule.

For many people, the honest answer is no leverage at all. If the position you sized in step 2 fits inside your account, you do not need it.

Practise before it costs anything

The best way to learn this is with pretend money at real prices. Atheron Trading offers paper trading, and until launch the bot trades with paper money only. Your rules, including budget and stop-loss, are checked before every trade, and every trade is explained, so you can see how sizing and stops behave.

Trading crypto carries real risk, with or without leverage. Leverage adds a second way to lose: being closed out before your plan gets a chance to work. Size from the stop first, and treat leverage as the last and smallest decision.

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