Strictly rating providers signals placed on the site. Algorithm for forming the rating takes into account many factors. But it is not always possible to achieve optimum results using only the rating. 2). An important factor when choosing a "provider" is the term of its activities. It often happens that a trader, showing a great return at the beginning, it quickly loses all earned money and even goes to the "minus". I would advise all not to consider the trade accounts for a term of life of less than 1 year. 3). Yield shown trader for the entire period and for the last month. Comparative returns for various periods and especially the value of so-called "subsidence accounts. "Drawdown account" or "Maximum drawdown account" – this is the maximum "depth" of assets fall from its maximum value, in percentage terms. Let's say through "rose to 100 units, then "dropped" to 80 and then again began to "grow", breaking the mark of 100. In this case the "maximum drawdown accounts amounted to 20 percent. The smaller the number, the more attractive "provider". 4). Principle diversification – the cornerstone principle of investing. Nabivshaya nauseam truth that "it is impossible to keep all your eggs in one basket." No matter how good you looked "signal provider does not sign his trading account just under it. Be sure to include at least one more "provider" by spreading their risks. 5). Equity "provider". Some ISPs do not send signals to the real and demo account. Personally, I am very negative attitude towards the idea to subscribe to the signals from the account, manipulating virtual money. However, some traders there is a psychological barrier, which lies in the fact that, being very successful on the demo, they suffer huge losses when it comes to trading with real money. 6). One of the key, in my opinion, the principles of investing. I do it conventionally call the "dynamic principle." The fact that my opinion, how well were not matched "signal providers, over time, the results of their trade can be quite worse. Therefore, it is not possible, once to choose the right "providers", taking into account all of the above criteria for a lifetime to get stable and high profit. Necessary, from time to time to monitor the results and constantly monitor the status of your merchant account. PS By the way have described here a system of automated trading have a pretty interesting feature, "Reverse". With this feature, you pick the worst "providers", and sign in under their signals up to a "reverse". That is when they buy, you sell, and when they sell you buy. They say that the results can be quite a good system, though I myself have not tried. Successful to all of you investment.