export declare function directionSign(isLong: boolean): 1 | -1;
export declare function estimateIsolatedLiquidationPrice(params: {
    entryPrice: number;
    leverage: number;
    isLong: boolean;
    maintenanceMarginRate: number;
}): number | undefined;
export declare function predictAverageEntryPrice(params: {
    currentSize: number;
    currentEntry: number;
    addSize: number;
    fillPrice: number;
}): number | undefined;
export declare function predictNewLeverage(params: {
    currentNotional: number;
    currentMargin: number;
    addNotional: number;
    addMargin: number;
}): number | undefined;
export declare function predictUnrealizedPnl(params: {
    entryPrice: number;
    markPrice: number;
    size: number;
    isLong: boolean;
}): number;
export declare function realizedPnlOnClose(params: {
    entryPrice: number;
    closePrice: number;
    closeSize: number;
    isLong: boolean;
}): number;
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