It's bollinger Brand MQL Code

//+------------------------------------------------------------------+
//| Bollinger MA Price.mq4 |
//| Paladin80 |
//| forevex@mail.ru |
//+------------------------------------------------------------------+
#property copyright "Paladin80"
#property link "forevex@mail.ru"

#property indicator_chart_window
#property indicator_buffers 3
#property indicator_color1 LightSeaGreen
#property indicator_color2 LightSeaGreen
#property indicator_color3 LightSeaGreen
//---- indicator parameters
extern int BandsPeriod=20;
extern int BandsShift=0;
extern double BandsDeviations=2.0;
extern int MA_method=0;
extern int Applied_price=0;
bool error=false;
      /* MA_method: 0 - Simple moving average,
          1 - Exponential moving average,
          2 - Smoothed moving average,
          3 - Linear weighted moving average.
          Applied_price: 0 - Close price,
          1 - Open price,
          2 - High price,
          3 - Low price,
          4 - Median price,
          5 - Typical price,
           6 - Weighted close price, 
       */
//---- buffers
double MovingBuffer[];
double UpperBuffer[];
double LowerBuffer[];