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