What position size tells you
Position size is the notional exposure created by multiplying the wager by the selected leverage. If the wager is $20 and leverage is 25x, the simplified position size is $500. The number does not mean $500 leaves your balance; it describes how strongly the wager responds to movement in the referenced market.
The formula is useful because it puts different combinations on the same scale. A $10 wager at 100x and a $100 wager at 10x both create $1,000 of illustrative exposure. Their effect on the rest of a player’s bankroll is not the same, however, because the amounts placed at risk are different.
Three numbers to compare together
Read wager, position size and bankroll percentage as a set. Wager is the maximum amount committed to the individual outcome. Position size describes sensitivity. Bankroll percentage shows how much of the session budget disappears if the wager is lost completely.
$25 at 40x produces $1,000 of exposure. If the session bankroll is $250, the wager risks 10% of it. If the bankroll is $2,500, the same wager risks 1%—even though market sensitivity is unchanged.
Why the formula is not a quote
The multiplication omits opening fees, performance fees, price spreads, holding charges, execution effects and the exact loss boundary shown by the product. It should be used for orientation, not settlement. Moon.com’s confirmation screen is the source for the actual values attached to a specific wager.
Changing the direction from Up to Down does not change position size. It changes which direction of price movement is favorable. The calculator therefore separates exposure from outcome rather than pretending one number explains both.
A position-sizing routine
- Choose a session budget that is separate from essential spending.
- Set the wager before selecting an attractive multiplier.
- Calculate position size and bankroll-at-risk percentage.
- Compare leverage with normal volatility in the selected market.
- Read the live fees and Bust Price before confirming.
If the result only feels acceptable when the market moves immediately, the leverage may be too aggressive for the intended holding time.
Source standard
Product mechanics are checked against Moon.com’s official help material. Mathematical examples are labeled as simplified and exclude product-specific costs. The live wager summary remains authoritative.