Wrong example in docs.

 

https://www.mql5.com/en/docs/series/ispread


The example is not an example of ispread.

Documentation on MQL5: Timeseries and Indicators Access / iSpread
Documentation on MQL5: Timeseries and Indicators Access / iSpread
  • www.mql5.com
iSpread - Timeseries and Indicators Access - MQL5 Reference - Reference on algorithmic/automated trading language for MetaTrader 5