Max leverage is the highest leverage setting a platform permits for a particular contract and account. It is a product limit, not a statement that every order size can use that setting or that doing so is appropriate for a trader.
The ceiling can depend on size
Many derivatives venues use risk tiers: larger position values require more initial margin and therefore allow less leverage. Pending orders may count toward the relevant exposure limit. A leverage level available for a small trade may consequently be unavailable when adding to the position.
Under a simplified notional-divided-by-leverage model, a 20× ceiling corresponds to initial margin of at least 5% of notional. This calculation excludes fees, buffers and other requirements; it does not establish any platform’s actual margin schedule.
A current parameter, not a permanent promise
Maximum leverage can change when a platform adjusts liquidity or market-risk assumptions. The effect on existing positions, pending orders and new trades depends on the announced rules and account setup.
A lower chosen leverage normally requires more margin for the same notional, while the absolute price-based PnL remains unchanged. Liquidation still depends on maintenance requirements and account equity, so the maximum setting alone cannot identify an exact liquidation price.