Mr Blue works on all timeframes without losing its profitability. However, the greatest efficiency has been observed on M15.
Suggested Currency Pairs:
All the major currencies is strongly recommended. Anyway you can optimize itfor any currency pairs.
According to Backtesting on EURUSD M15 using ForexTester M1 Data:
Here there are 12 different configs of Input Parameters that you can set anyone of them. Or you can change parameters as you wish.
I have intitled anyone of these configs a Plan. (from Plan A to L)
On this table you can see the results: