1. It is always a risk.
2. Look for more indicators, not just TOP, vyiskiyvaete most effective (level lot and there are several simultaneous discoveries (hence not martingale)), duration of trade drawdown, Sharpe coefficient, the number of subscribers) all this will allow you to reduce the risk of failure.
3. The yield should be moderate, very good yield of 50% per month (but there is a significant risk), not bad - 10% per month.
4. You can sign up for my account, everything is balanced, but at 0.10 USD is better to have 10 000USD, or 0.01 - 1000 USD, yield will be about 10-15% per month.