Trading strategies encoded into Expert Advisors are as diverse as the strategies used for manual trading.
They indicate to their clients when it is an appropriate time to carry out buy-sell actions of main currency pairs on the Forex market, based on analysis Software Expert Advisors have multiple trading strategies.
Some Expert Advisors employ risky trading strategies (like Martingale) or lack money-management features.
A forex robot (aka "expert advisor") is software that trades a strategy for you.
https://mailchi.mp/f5e54b1a1d90/fxzig