Support and Resistance is classic genius. It works at all times. The only tough call is to determine accurately what is the resistance and support in the chart.
once you "intimately" know this (which of course needs some training, consistency and practice)- trade long when the price is at support and sell it at the resistance. Or trade short when price is in the resistance and buy in the support. A high winning system.
The simplest trading system you can use that WORKS!