MQLで上昇・下降で色が変わる移動平均線を作る方法（MT4・MT5）

MQL4（MT4）コードをコピー

#property strict
#property indicator_chart_window
#property indicator_buffers 2
#property indicator_color1 clrDodgerBlue
#property indicator_color2 clrRed
#property indicator_width1 2
#property indicator_width2 2
// 上向きは青、下向きは赤で表示する移動平均線（MT4）
input int InpPeriod = 20;   // 期間

double UpBuf[], DnBuf[];

int OnInit()
{
   SetIndexBuffer(0, UpBuf);
   SetIndexBuffer(1, DnBuf);
   SetIndexStyle(0, DRAW_LINE);
   SetIndexStyle(1, DRAW_LINE);
   return INIT_SUCCEEDED;
}

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[])
{
   if(rates_total <= InpPeriod + 2) return 0;
   int limit = rates_total - prev_calculated + 1;
   if(prev_calculated == 0) limit = rates_total - InpPeriod - 2;
   for(int i = limit; i >= 0; i--)   // MQL4 は 0 = 最新の足
   {
      double ma0 = iMA(_Symbol, 0, InpPeriod, 0, MODE_SMA, PRICE_CLOSE, i);
      double ma1 = iMA(_Symbol, 0, InpPeriod, 0, MODE_SMA, PRICE_CLOSE, i + 1);
      UpBuf[i] = EMPTY_VALUE;
      DnBuf[i] = EMPTY_VALUE;
      if(ma0 >= ma1)
      {
         UpBuf[i] = ma0;
         if(DnBuf[i + 1] != EMPTY_VALUE) UpBuf[i + 1] = ma1;   // 色の切り替わりで線をつなぐ
      }
      else
      {
         DnBuf[i] = ma0;
         if(UpBuf[i + 1] != EMPTY_VALUE) DnBuf[i + 1] = ma1;
      }
   }
   return rates_total;
}

MQL5（MT5）コードをコピー

#property indicator_chart_window
#property indicator_buffers 2
#property indicator_plots   1
#property indicator_type1   DRAW_COLOR_LINE
#property indicator_color1  clrDodgerBlue, clrRed
#property indicator_width1  2
// 上向きは青、下向きは赤で表示する移動平均線（MT5）
input int InpPeriod = 20;   // 期間

double MaBuf[], ColorBuf[];
int hMa = INVALID_HANDLE;

int OnInit()
{
   SetIndexBuffer(0, MaBuf, INDICATOR_DATA);
   SetIndexBuffer(1, ColorBuf, INDICATOR_COLOR_INDEX);   // 色の番号（0=青、1=赤）
   hMa = iMA(_Symbol, PERIOD_CURRENT, InpPeriod, 0, MODE_SMA, PRICE_CLOSE);
   return hMa == INVALID_HANDLE ? INIT_FAILED : INIT_SUCCEEDED;
}

void OnDeinit(const int reason)
{
   IndicatorRelease(hMa);
}

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[])
{
   if(rates_total <= InpPeriod + 1 || BarsCalculated(hMa) < rates_total) return 0;
   if(CopyBuffer(hMa, 0, 0, rates_total, MaBuf) < rates_total) return 0;   // バッファに直接コピー
   int start = (prev_calculated > 1) ? prev_calculated - 1 : InpPeriod;
   for(int i = start; i < rates_total; i++)
      ColorBuf[i] = (MaBuf[i] >= MaBuf[i - 1]) ? 0 : 1;
   return rates_total;
}