In the context of MetaTrader programming, the term "forex global variable" typically refers to a variable with a global scope within the MetaTrader trading platform. MetaTrader 4 (MT4) and MetaTrader 5 (MT5) are widely used platforms for developing and executing algorithmic trading strategies. In this environment, global variables are declared outside specific functions, making them accessible throughout the entire program or script.

Forex global variables in MetaTrader scripts are crucial for storing and sharing information across different parts of an algorithm. Traders and developers often use them to retain important data, such as account information, trade parameters, or market conditions, ensuring consistency and coherence in the execution of automated trading strategies. Careful management of global variables is essential to maintain the integrity and efficiency of MetaTrader scripts, contributing to the effectiveness of algorithmic trading in the forex market.