I have never paid for a course, there is enough knowledge out there for you to come up with a good strategy. Many people fail in this business in my humble opinion because they try to mechanize there system. Things don't work like that in the real world. If such an indicator existed everyone would be a millionaire. Don't follow what the crowd is doing. Instead, learn how institutions trade the markets.
I trade for a living. I don't day trade. Sometimes my trades can last for a day, a week, a couple of weeks. I tape read the market which should tell me when to exit a position. It's very difficult requires great dedication in terms of study and there are so many scammers in this industry.