/**
* Stop Loss Exit Condition Checker
* Check if current price hit stop loss level
*/
import { PositionState, ExitCondition, ExitReason } from '../types'
export interface StopLossConfig {
enabled: boolean
defaultStopLossPct: number
usePercentageBased: boolean
useFixedPrice: boolean
}
export function checkStopLoss(
position: PositionState,
currentPrice: number,
config: StopLossConfig
): ExitCondition | null {
if (!config.enabled || !position.stopLoss) {
return null
}
const stopLossLevel = position.stopLoss
const shouldExit = position.side === 'LONG'
? currentPrice <= stopLossLevel
: currentPrice >= stopLossLevel
if (!shouldExit) {
return null
}
const distanceFromSL = position.side === 'LONG'
? ((currentPrice - stopLossLevel) / position.entryPrice) * 100
: ((stopLossLevel - currentPrice) / position.entryPrice) * 100
return {
reason: 'STOP_LOSS' as ExitReason,
priority: 2, // Second priority after EMERGENCY
shouldExit: true,
exitSize: 100, // Full exit
exitPrice: stopLossLevel,
metadata: {
stopLossLevel,
currentPrice,
distanceFromSL,
side: position.side
},
timestamp: Date.now(),
description: `Stop loss hit at ${stopLossLevel.toFixed(4)} (current: ${currentPrice.toFixed(4)})`
}
}
export function calculateStopLoss(
entryPrice: number,
side: 'LONG' | 'SHORT',
stopLossPct?: number,
defaultPct: number = 2
): number {
const slPct = stopLossPct != null ? stopLossPct : defaultPct
return side === 'LONG'
? entryPrice * (1 - slPct / 100)
: entryPrice * (1 + slPct / 100)
}
