A sign of strength, or SOS, is a decisive rally out of an accumulation range on expanding volume and wide up-candles. It is the market confirming that demand has finally overpowered supply after the range did its absorbing work.
What makes it convincing
A genuine SOS shows effort matching result: strong volume and wide spread carrying price clearly above the range highs, with little overhead resistance able to stop it. The move usually breaks prior swing highs, flipping structure from sideways to up.
The pullback after an SOS is often called the last point of support (LPS) — a higher low that holds above the breakout on lighter volume. That pullback frequently offers a lower-risk entry than chasing the initial thrust.
A sign of strength is a wide, high-volume rally out of the range — demand confirming the start of a possible markup.
An SOS confirms strength but does not guarantee a lasting trend; breakouts still fail and can turn into upthrusts. Prefer entries on the LPS with a stop below it, and let the market prove continuation rather than assuming it.