According to 2018 following are the best currency pairs.
EUR/USD (Euro – US dollar)
USD/JPY (US dollar – Japanese yen)
GBP/USD (British pound – US dollar)
AUD/USD (Australian dollar – US dollar)
USD/CHF (US dollar – Swiss franc)
USD/CAD (US dollar – Canadian dollar)
GBP and Yen are generally accepted as the bad boys of the G8 re volatility....USD and Euro generally are in bottom half in my experience .....so some days you might get a decent kicker on EU but only if they are uncorrelated as currencies on that day .....so like the london session at this very moment
euro is bull but GBP is more Bull at moment
USD is Bear but Yen is more bear
EU is a decent scalp ......but GBP and or Yen pairs are better at moment
I was responding to the comment above mine that referred to USD/TRY and USD/RUB. Both the RUB and the TRY have had quite the upheavals because of various political decisions, the TRY more recently than the RUB.
Forex refers to the foreign currency exchanges where a trader can exchange one currency for another. And no doubt every forex trader will have his preferred currency pair here. And for this a trader’s choice can be easily different from the others. I love to trade various major pairs like USD/EUR, USD/JPY, USD/YEN, etc. What I love most about major currency pair is these pairs show less instability than others.