FIFO rules explained

It is my understanding that US Brokers have a FIFO rule (first in-first out).  An expert advisor robot I am trying out (in demo mode) sometimes doubles its position when the market goes against the trade.  I am concerned that, when I start trading on a real account, having multiple open positions might violate the US FIFO rule.  For instance, when multiple positions are closed at the same time.

Can someone explain the FIFO rule? 
Is it legal for a US citizen to violate the FIFO rule when using a foreign broker (that does not enforce a FIFO rule)?




Linkback: https://www.forex.zone/forex-education/29/fifo-rules-explained/3669/

if you want to trade using a robot or EA then we really understand the character and how it works, because it will be able to make us later understand and can maximally use it

when we design a system we really have to understand what we need to form a good and profitable signal

You have to be careful using ea, not all of them can make a profit, you have to be careful using it before you fall

FIFO (First In First Out) is a rule in forex trading that requires traders to close their oldest open position first in the event of a trade exit. This rule applies to traders in the US who are regulated by the National Futures Association (NFA). It is designed to prevent traders from engaging in hedging practices and to ensure that trades are closed in the order they were opened. FIFO can affect a trader's ability to manage their trades and may result in additional transaction costs. Traders should be aware of the rule and how it may impact their trading strategy.