PAMM, stands for Percentage Allocation Management Module, and has become a very popular forex broker extension that allows advanced traders or money managers to manage other clients (traders) funds. This module simplifies and secures the business relationship between Investors, traders (Money Managers) and the broker. In other words forex brokers offering this service, provide money managing services for traders that do not want or cannot trade themselves.
This concept has great similarities to copy trading, as it is pretty much the same concept but in a different way. When using this service, traders do not have full control of their funds. The money manager is taking all the decisions and charges the investor a small profit. In the case of copy trading, or social trading, investors choose which trade would suit them the most and can open or close a position if they changed their mind.
Here is a list of forex brokers that offer PAMM services
MAS, JFSA, DIFC