Been using trade vinayak for sometime. It has 2 signals for Nifty based on 30 min and 60 min charts.
The 30 min signal isn't good enough. Keeps whipsawing. It will work well in a trending market but how to know if the market is going to trend or not is the question.
The 60 min signal just gives a level - which says long above or short below. It doesn't give any stops or targets. This apparently has a success rate of around 65-70% - so they say. I don't know how they calculate that, since it doesn't give a stop or a target.
The 30 min gives a stop, target, new entry and volatility.
If you do buy it, I suggest you take trades based on the 60 min signals.