Hi. Jfink. I have spent 5 years working at a prop trading firm and can categorically tell you that none of our trades are based on systems that incorporate conventional technical indicators. S/R is all that needed to be able trade and beat the markets consistently. It is not simple though.
The following difficulties are forever present; Firstly, not all S/R levels are created equally. The key to drawing effective S/R levels is in being able identify price levels that have the most psychological impact on market participants.
Being able to identify where a large number of market participants who are long/short will want to take profits, losses or close at break even, being able to identify where a large number or market participants who are not currently in the market are likely to want to get into the market and being able to identify where market participants who are already long/short would likely add to positions are a few of the aspects that critical in calculating the S/R levels that are actually worth trading off. Having a good understanding of where the most stop and limit orders are is also critical to trading S/R effectively.
The following points are all learnable through experience but are not really something that can be incorporated into a rigid system because they are forever changing with the flow of the market.
Furthermore, once you understand how to identify the S/R levels that are worth trading off you still need to overcome the common pitfalls of losing traders; poor money management, a lack of confidence, too much confidence, not trading off a plan, not keeping records, not having patience, having unrealistic expectations of how much money you could make, having a false belief that you can predict market direction, constantly changing your approach because you do not understand the expectancy of an edge. Etc. these are just some of the many things that mean no trading methodology is ever simple or easy. I trade exclusively from S/R levels and have a video blog that I make every day that highlights my trading plans for the day and the levels that I consider important.. It is completely free and invite you to send me a private message if you would like a link to it. Best of luck with your trading.