【MT4マルチタイムフレーム】エンベロープ（MTF-Envelopes）

//+------------------------------------------------------------------+
//|                                                MTF-Envelopes.mq4 |
//|                                  Copyright 2022,Greeds Co., Ltd. |
//|                                               https://greeds.net |
//+------------------------------------------------------------------+
#property copyright   "2005-2014, MetaQuotes Software Corp."
#property link        "http://www.mql4.com"
#property description "Bill Williams' Aligator"
#property strict

#property indicator_chart_window
#property indicator_buffers 2
#property indicator_color1  Blue
#property indicator_color2  Red

input ENUM_TIMEFRAMES in_timeFrame = PERIOD_CURRENT;    // マルチタイムフレーム
input int          in_period=14;                           // 期間
input ENUM_MA_METHOD in_method=MODE_SMA;                        // 移動平均の種別
input int          in_shift=0;                            // シフト
input ENUM_APPLIED_PRICE in_applied_price=PRICE_CLOSE;  // 適用価格
input double       in_deviation=0.1;                        // 偏差(%)

double Buf1[];
double Buf2[];
void OnInit(void)
{
  SetIndexBuffer(0,Buf1);
  SetIndexBuffer(1,Buf2);
  SetIndexStyle(0,DRAW_LINE);
  SetIndexStyle(1,DRAW_LINE);
}

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[])
{
  int limit=rates_total-prev_calculated;
  for(int i=0; i<limit; i++)
  {
    int shift = iBarShift(NULL, in_timeFrame, time[i]);
    Buf1[i]=iEnvelopes(NULL,in_timeFrame,in_period,in_method,in_shift,in_applied_price,in_deviation,MODE_UPPER,shift);
    Buf2[i]=iEnvelopes(NULL,in_timeFrame,in_period,in_method,in_shift,in_applied_price,in_deviation,MODE_LOWER,shift);
  }
  return(rates_total);
}