Sniperforex is just and indicator that is based on the 1hr timeframe. They also strongly recommend trading GU during the hours of 6:00- 22:00 GMT.
I have used it on other pairs as well. It gives fairly simple instructions on when to enter and exit. It does give some nice gains but find it's risk/reward or money management pretty bad.
You might get yourself a 100-200 pip gainer from time to time but then you find yourself having 5 or 6 trades in a row that take back 30 pips or so.
It is by no means a perfect 100% type of system but no system is such. But trading alongside the fib boxes and TDI, you might have better trades overall.
I bought it years ago when I first tried forex. The price has increased now and I think it cost $500. But I'm sure if you search hard enough, you can find it on the web much cheaper.....