Especially in a short time frame--1-60 minutes and esp in emini SP's for example the approach describe seem to invite getting pounced upon by folks gunning for stops.
When S and R are obvious to a million people staring at the same screen, some bunch are going to gun for the other gun slingers buying at resistance.
I've heard "experts" suggest staying away from round numbers for example.
William Eng's book (can't recall title) deals with such setups a lot. But it was written 15(?) years ago and a lot has changed in daytrading since then. When 50% of NYSE volume is program trading, the old wisdom gets in trouble unless you have deep pockets.
as some said above, I'd work with some other indicators to test if support is holding--Tick, volume, rsi for example.
Perhaps not taking every set up. Let price poke below resistance as stops get hit or shorts jump in to sell below support, and then buy several ticks above the support line. cover if price then turns and goes below the last low below support. taking profit and stop protection is a whole other topic.
also as suggested above, the trend context (up day, favorable MACD) would temper.filter which trade you would lean toward--buy at support or sell resistance breaks.
