Period for various indicators in code

Hi I have seen the predefined strategy available in Pi. I wanted to know will these work for intraday trading.

Secondly in the code I see that there are certain numbers used. FOr eg for EMA there could be 100 or 50. Are these numbers days or number of candles. If trading on 5 min intraday chart how do I get the EMA for 15 min and 30 min in the code