They are not to be avoided but they are more inconvenient. First because they do not have a regulated market, second because they do not have reliable historical data, third because they have higher spreads.


See also the videos:

How to trade the Currency Market

https://youtu.be/mb94xSZhHys

How to Trade the Index Futures’ Market

https://youtu.be/hYJbW11G5Bk