#include <contract.c>

// Define your global parameters such as target profit, days to expiration, and strike price offset
var TargetProfit = 500; // Example target profit
int DaysToExpiration = 30; // Target days until expiration
var StrikeOffset = 50; // Offset from the current price for strike selection

void run() {
  // Setup basic parameters
  BarPeriod = 1440; // Use daily bars
  LookBack = 0; // No need for historical bars in options trading setup
  StartDate = 2020;
  EndDate = 2024; // Set your backtest period
  assetList("AssetsIB");
  asset("SPY"); // Example using SPY ETF as the underlying asset

  // Ensure we're trading in American Options for SPY
  AmericanOption = 1;

  // Update the contract chain for the underlying asset
  if(!contractUpdate(Asset, 0, CALL | PUT)) return;

  // Trading logic executed once per day
  if(is(EXITRUN)) return; // Skip logic at the end of the backtest
  
  // Define your strangle strategy here
  if(NumOpenLong + NumOpenShort == 0) { // Check if there's no open position
    // Calculate target strike prices based on current price and offset
    var CurrentPrice = priceClose(0);
    var StrikeCall = CurrentPrice + StrikeOffset;
    var StrikePut = CurrentPrice - StrikeOffset;

    // Attempt to find and enter a Strangle combo
    if(combo(
      contractFind(CALL, DaysToExpiration, StrikeCall), 1, // Buy 1 Call
      contractFind(PUT, DaysToExpiration, StrikePut), 1,  // Buy 1 Put
      0, 0)) { 
        // Enter the combo trade
        enterLong(comboLeg(1)); // Enter long for the call option leg
        enterLong(comboLeg(2)); // Enter long for the put option leg
    }
  }

  // Monitor and manage open positions
  for(open_trades) { // Loop through all open trades
    if(TradeIsOption && TradeIsOpen && (comboProfit(TradePriceClose, 1) > TargetProfit || daysToExpiration() < 5)) {
      exitTrade(ThisTrade); // Close the trade if target profit is reached or approaching expiration
    }
  }
}

// Placeholder function for days to expiration calculation - implement as needed
int daysToExpiration() {
  // Custom logic to calculate and return days to expiration for the current combo
  return 10; // Placeholder return value
}

// Placeholder function for calculating combo profit - implement based on actual requirements
var comboProfit(var CurrentClosePrice, int Leg) {
  // Custom logic to calculate and return profit for the combo based on current prices
  return 600; // Placeholder return value
}