//+------------------------------------------------------------------+
//| Script tick function |
//+------------------------------------------------------------------+
void OnTick()
{
   // Calculate moving averages
   double ma7 = iMA(_Symbol, PERIOD_CURRENT, 7, 0, MODE_SMA, PRICE_CLOSE, 0);
   double ma5 = iMA(_Symbol, PERIOD_CURRENT, 5, 0, MODE_SMA, PRICE_CLOSE, 0);

   // Check for buy/sell conditions
   if (ma7 < ma5 && Close[1] > ma5 && Open[1] < ma5)
   {
      // Buy condition met, execute trade
      if (OrderSelect(0, SELECT_BY_POS) && OrderType() == OP_BUY)
      {
         // Close existing buy order
         OrderClose(OrderTicket(), OrderLots(), Bid, 3, clrNONE);
      }
      else
      {
         // Open new buy order
         OrderSend(_Symbol, OP_BUY, 0.1, Ask, 3, Bid-20*Point, Bid+20*Point, "MyOrder", 0, 0, Green);
      }
   }
   else if (ma7 > ma5 && Close[1] < ma5 && Open[1] > ma5)
   {
      // Sell condition met, execute trade
      if (OrderSelect(0, SELECT_BY_POS) && OrderType() == OP_SELL)
      {
         // Close existing sell order
         OrderClose(OrderTicket(), OrderLots(), Ask, 3, clrNONE);
      }
      else
      {
         // Open new sell order
         OrderSend(_Symbol, OP_SELL, 0.1, Bid, 3, Ask-20*Point, Ask+20*Point, "MyOrder", 0, 0, Red);
      }
   }
}

//+------------------------------------------------------------------+
//| Risk management function |
//+------------------------------------------------------------------+
void OnTrade()
{
   // Calculate fixed risk amount (5% of initial balance)
   double riskAmount = AccountBalance() * 0.05;
   
   // Set stop-loss and take-profit levels
   double stopLoss = 15 * Point;
   double takeProfit = 75 * Point;
   
   // Set lot size based on risk amount
   double lotSize = riskAmount / (stopLoss * 100);
   
   // Execute trade with calculated lot size
   OrderSend(_Symbol, OP_BUY, lotSize, SymbolInfoDouble(_Symbol, SYMBOL_ASK), 3, stopLoss, takeProfit, "MyOrder", 0, 0, Green);
}