I can't define it for you, and no I don't mean a sell off either.
When a stock has run up over 100% in a matter of weeks and then drifts back to 'only' 50-60% above where its come from, I call that a bit overbought and then consolidation or softening. A sell off to my mind is when it falls back below where it came from.
EVS is still sitting well above it's high of the last three years apart from the recent spike. Still sitting well above 100 and 200 day MA too. I'm not trying to convince anyone of anything, just commenting.
EVS Price at posting:
14.5¢ Sentiment: Hold Disclosure: Held
