Role Reversal

What is Role Reversal?

Role reversal, also called the polarity principle or the S/R flip, is the classical rule that a broken support level tends to act as resistance once price trades below it, and broken resistance tends to act as support once price is above. The standard behavioral story: traders who bought the old support and sat through the break look to exit near breakeven when price returns, sellers who covered too early re-enter, and breakout traders who missed the move leave orders at the old boundary. All of that interest clusters at the same price from the opposite side.

The classic expression is break, then retest, then continuation, and the logic recurs across schools: Smart Money Concepts' breaker block applies the same flip to order blocks. The honest caveat is that flips are a tendency, not a law. Some broken levels are never retested, some flips get run straight through, and a failed flip (price re-entering its old range and holding there) is itself evidence that the break was false.

How traders use it

• Break-and-retest entries: wait for a decisive close through the level, then trade the first return to it in the breakout direction, with the stop placed beyond the flipped level where the thesis is invalid.
• Trend mapping: healthy uptrends repeatedly turn old resistance into support, so flipped levels become natural checkpoints for pullback entries and trailing decisions; downtrends mirror this.
• As an invalidation tripwire: when price trades back through a level that was supposed to have flipped and holds on the wrong side, downgrade the breakout to a suspected false break and reassess bias.