the rule
Opening a position costs 1% of the wager. Moon's glossary states the fee
is "calculated solely on your wager amount" and is "not calculated on your total
leveraged exposure". The same fee is charged again if you flip the direction of an
open position.
Moon betting glossary, opening fee and flip.
the arithmetic
Write W for the wager, L for leverage and
m for the price move as a fraction. Exposure is
W × L. Profit is W × L × m. The opening
fee is W × 1/100, with no L in it.
Set profit equal to the fee and the wager cancels, so breakeven is
m = 1/100 ÷ L. Moon closes the position when losses reach
the wager, which is m = 1 ÷ L. Divide breakeven by the max loss
distance and the L cancels too, leaving
1/100.
That last cancellation is the useful one. The opening fee costs
1% of your runway at every rung on the
ladder, no matter how far away the max loss price is.
the ladder, on a $100 wager
| Leverage | Exposure on $100 | Costs to open |
Breakeven move | Max loss move |
| 2× | $200 | $1.00 | 0.5000% | 50.000% |
| 5× | $500 | $1.00 | 0.2000% | 20.000% |
| 10× | $1,000 | $1.00 | 0.1000% | 10.000% |
| 20× | $2,000 | $1.00 | 0.0500% | 5.000% |
| 50× | $5,000 | $1.00 | 0.0200% | 2.000% |
| 100× | $10,000 | $1.00 | 0.0100% | 1.000% |
| 200× | $20,000 | $1.00 | 0.0050% | 0.500% |
| 500× | $50,000 | $1.00 | 0.0020% | 0.200% |
| 1000× | $100,000 | $1.00 | 0.0010% | 0.100% |
Exposure is stake multiplied by leverage. The opening fee is
1% of the $100 stake at every rung, which is why the third column does not
move. Breakeven is the move that covers that fee. Max loss move is the adverse
move that costs the whole stake, which Moon puts at one part in the leverage with
no maintenance buffer ahead of it. A rolling fee applies every 8 hours at a
rate Moon does not publish and is not included in any column.
what changes and what does not
Going from 10× to 1000× multiplies exposure by 100, multiplies profit
per unit of move by 100, and multiplies the opening fee by exactly 1. It divides
your runway by 100, from 10.000% to 0.100%.
So there is no fee-based reason to prefer a low rung. The reason to prefer a low
rung is that markets move, and 0.100% is not a distance, it is a rounding error on
most of the 45 markets measured on this site.
see how far each market actually
moves in a session
three costs that are not in any number on this site
Moon documents a rolling fee charged every 8 hours and describes the
rate as dynamic. It publishes no figure for it. Two further costs are reported by
third-party testers and appear nowhere in Moon's own documentation: a performance
fee taken from realised profit, and a spread inside the settlement price.
Not one of the three is modelled anywhere on this site. Guessing at them would
make every table look precise and be wrong, which is the trade this site refuses
to make. Treat every cost figure here as a floor. A position held overnight,
or closed at a profit, will have paid more than these pages show.
Rolling fee: Moon betting glossary.
Performance fee and settlement spread: third-party fee analysis,
not corroborated by Moon's own documentation.
the correction on this page
Until August 2026 this site modelled Moon's cost as 16 basis points of round
trip charged on leveraged exposure. At 1000× that implied an opening cost of
160% of the stake, and the pages said so. It was wrong by roughly a factor of 160
and it was wrong in the direction that made Moon look worse. Every derived figure
has been rebuilt from the glossary.
The correction is logged on the
corrections page.
MarketMoves earns a commission when a reader opens an account through a link on this page. It costs the reader nothing and does not change the figures shown. That commission does not change what the tables say. The cost model on this page was rebuilt in August 2026 after a review found it overstated Moon's opening fee, and correcting it made Moon look cheaper, not dearer. See the affiliate disclosure and the methodology.