DislikedScrat is correct. Trend & volitility are key when choosing a pair. Others can be profitable too but you may want to adjust your SLs & TPs. You can't expect a 100 pip TP if it is expected to move 30 pips. See below (from SFO mag):Average Daily Range (pips)
GBP/JPY 148
Remember, the markets are always dynamic.
GBP/USD 142
EUR/CAD 125
EUR/AUD 122
GBP/CHF 117
USD/CHF 117
EUR/USD 101
EUR/JPY 99
USD/JPY 99
USD/CAD 92
AUD/JPY 73
NZD/USD 72
AUD/USD 67
CHF/JPY 67
EUR/CHF 47
EUR/GBP 34
Ignored