Hello, I am testing a strategy using the RSI data provided by myfxbook (they have a table with the values ​​of all timeframes, always being updated).

It turns out that the RSI values ​​they present differ a lot from the values ​​I see in the RSI indicator in mt4 and I already compare with different brokers. Sometimes in M5 usdjpy could show a value of 75 on my mt4 and they show like 42.

Does anyone know how their values ​​are being calculated?

Thanks a lot