From the link:
SPY is at a level it rarely sees, five times actually since May, and each time signaled at least a bounce if not tomorrow (Thursday), soon…
Given that SPY is a broad measure of the general market and a big-money index, when it bounces it will take most of the market with it so it might be prudent for swing-trading shorts to tighten stops or take some profits here.
For more , like the 3x-leveraged ETFs especially: