Indicator

The 'Ask' line is formed as the 'Close' price + the value from the 'spread' array (we take the array from OnCalculate)

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[])

Pic. 1. Candles Ask