I use RSI all the time but not based on closes and use it especially during trending markets. As a Scalper, you just learn which highs/lows to counter-trend and which to go with trend. Matter of fact, RSI is a great tool for a trend trader during hard trends as it shows up with many divergences. Quoting those who sell services, if they knew how to trade they be doing size and not messing with charging folks $300 a month for their cornball services.
oilfxpro- you should check out some courses at UPenn or a NYC school or Harvard Business School on trading. You can learn allot of new things that nobody will tell you in a faster way. Forget about degrees, just take courses that matter.