When I use S/R in the conventional way, about 90% of the time it's not a level a technician would see on the chart, but afterwards, I had the pivot and it draws clear support on the chart. (Not saying my levels are right 90% of time but when I am going long in front of support/short in front of resistance, only 10% of the time is that a level that you can see on the chart as having been already established).
When it's already on the chart, I look at it unconvetionally... scalp the break of the level... if before it breaks I see signs of followthrough I try to hold some.