Double Bolling Band

ÿþ//+------------------------------------------------------------------+

//|                                                      BB_Signal.mq5|

//|                        Copyright 2023, MetaQuotes Software Corp. |

//|                                             https://www.mql5.com |

//+------------------------------------------------------------------+

#property copyright "2023, MetaQuotes Software Corp."

#property link      "https://www.mql5.com"

#property version   "1.00"

#property indicator_chart_window

//--- input parameters

input int      BB_KIKAN=20;  // BB period



double waitBB = 0; // Initialize waitBB

datetime prevtime;



int orderPtn=0; // 0: Do nothing, 1: Buy, 2: Sell



// Create buffers to hold the upper and lower bands

double upperBuffer[];

double lowerBuffer[];



double BB3UP, BB3LO, BB2UP, BB2LO; // Define these variables here to make them global



//+------------------------------------------------------------------+

//| Custom indicator initialization function                         |

//+------------------------------------------------------------------+

int OnInit() {

//---



   return(INIT_SUCCEEDED);

}



// Custom function to plot arrows

void PlotArrow(int direction, int shift, double price, color clr) {

   string arrowName = direction > 0 ? "BuyArrow" : "SellArrow";

   arrowName += "_" + IntegerToString(shift);

   if (ObjectFind(0, arrowName) != -1) {

      ObjectDelete(0, arrowName);

   }

   if (direction > 0)

      ObjectCreate(0, arrowName, OBJ_ARROW_BUY, 0, iTime(_Symbol, _Period, shift), price);

   else

      ObjectCreate(0, arrowName, OBJ_ARROW_SELL, 0, iTime(_Symbol, _Period, shift), price);

   ObjectSetInteger(0, arrowName, OBJPROP_COLOR, clr);

}



//+------------------------------------------------------------------+

//| Custom indicator iteration function                              |

//+------------------------------------------------------------------+

int OnCalculate(const int rates_total, const int prev_calculated, const datetime &time[], const double &open[], const double &high[], const double &low[], const double &close[], const long &tick_volume[], const long &volume[], const int &spread[]) {

// Get the handle of the Bollinger Bands indicator

   int handle = iBands(_Symbol, _Period, BB_KIKAN, 3, 0, PRICE_CLOSE);



// Copy the upper band (index 0) and lower band (index 2) into the buffers

   CopyBuffer(handle, 0, 0, rates_total, upperBuffer);

   CopyBuffer(handle, 2, 0, rates_total, lowerBuffer);



// Now you can get the upper and lower bands using the buffers

   BB3UP = upperBuffer[1]; // 3Ã upper

   BB3LO = lowerBuffer[1]; // 3Ã lower



// Repeat the same for the 2Ã Bollinger Bands

   handle = iBands(_Symbol, _Period, BB_KIKAN, 2, 0, PRICE_CLOSE);

   CopyBuffer(handle, 0, 0, rates_total, upperBuffer);

   CopyBuffer(handle, 2, 0, rates_total, lowerBuffer);



   BB2UP = upperBuffer[1]; // 2Ã upper

   BB2LO = lowerBuffer[1]; // 2Ã lower



//*** Buy/Sell Conditions ***//

// Rest of your code...



// If in a Buy or Buy-wait state

   if ((orderPtn == 1) || (waitBB > 0)) {

      // Buy within BB2 range

      if ((BB2UP > close[1]) && (BB2LO < close[1])) {

         orderPtn = 1;

         waitBB = 0;

         PlotArrow(1, 1, close[1], clrGreen); // Plot Green Arrow for Buy Signal

      } else {

         orderPtn = 0;

         waitBB = 1;

      }

   }



// If in a Sell or Sell-wait state

   if ((orderPtn == 2) || (waitBB < 0)) {

      // Sell within 2Ã BB range

      if ((BB2LO < close[1]) && (BB2UP > close[1])) {

         orderPtn = 2;

         waitBB = 0;

         PlotArrow(-1, 1, close[1], clrRed); // Plot Red Arrow for Sell Signal

      } else {

         orderPtn = 0;

         waitBB = -1;

      }

   }



   return(rates_total);

}

//+------------------------------------------------------------------+