Forex margin is a good faith deposit that a trader puts up as collateral to initiate a trade. Essentially, it is the minimum amount that a trader needs in the trading account to open a new position. This is usually communicated as a percentage of the notional value (trade size) of the forex trade. The difference between the deposit and the full value of the trade is “borrowed” from the broker.
Free margin in Forex is the amount of money that is not involved in any trade. You can use it to take more positions, however, that isn't all - as the free margin is the difference between equity and margin. If your open positions make you money, the more they achieve profit, the greater the equity you will have, so you will have more free margin as a result. There may be a situation when you have some open positions and also some pending orders simultaneously.

If you really want to know how effective robots are, you should check out reviews and authoritative testimonials online. Although they can scan millions of different charts within seconds, most often 90% will turn out incorrect information. This is understandable - because FX robots are just robots. Even though they are capable of performing highly sophisticated tasks, and many at once, every Forex robot or Forex robot free is still deprived of creative thinking. They cannot imagine what may take place in the near future, as their functionality is restricted to how they were initially programmed, as well as past performance.
This material does not contain and should not be construed as containing investment advice, investment recommendations, an offer of or solicitation for any transactions in financial instruments. Please note that such trading analysis is not a reliable indicator for any current or future performance, as circumstances may change over time. Before making any investment decisions, you should seek advice from independent financial advisors to ensure you understand the risks.