The best thing about them is that they are cent percent automatic. The automated tools as they are also called will do the work for you once they are programmed for the same. The entering and the exit of trade is done by them automatically. You need not spend time the whole day waiting for a good opportunity to trade in. the specific set of rules according to your strategy will suffice it to work and bring in good results in your favor thus generating good profits.
The tool can help you trade in forex as well as webmoney. And there are many companies making them to date now. The foremost expert advisors that are in use are the Meta Trader Expert Advisors. The one you choose can be downloaded from their sites for your use. Then you can use it after you have programmed it according to your strategic plans of working.
Before you go into buying one or installing one it will be good for you to know the working of each of the models and also the advantages and disadvantages of each of them. For this test each of them and change them using your demo account before you go in for an advisor that meets your standards.
Once it is installed it will do the speculation and trading no doubt but time and again an updating of the software will be required. So the best choice would be to pick one that comes with an automatic updating service. Otherwise the purpose of having an automated tool to trade on an outdated tool will not be served on one hand and on the other you may be making a loss instead of the profit. Thus when you have the option of choice, do make the full use of it.