Customers over the market prefer:

[Mohammed Mounir]

products with full description of how it works and good real results will be perfect 

[Thomas Werra]

I don't think that theres a single signal with a full description of how the strategie works. I mean things like "If indicator x shows result y then buy". In the end it is not that important how it works, as long as it works at all. I for myself look at how the signal provider behaves and how the stats are. Most important to me: Low drawdown, minimum 1k real money, no deposits while trades open to hide big drawdowns (this one is critical as thats how followers lose everything!), no martingale, average opden trade time of no less than 30 minutes and always a stop loss. As long these things are OK, i don't care that much about the profit, as time will bring the money.