How simple can a trading system be?
Just use support and resistance.
Taking going long as an example.
1 Open a position at the support level.
2 Set a stop loss below the support level.
3 Hold the position as long as the stop loss is not triggered. If there is a profit and the price enters between the resistance and support, exit the position and set the stop loss at the breakeven price.
4 Take profit at the resistance level.
That's it.
It's that simple.