PLTR finally lost the $20 support level that has formerly held strong across many months. This in and of itself indicates that bulls have run out of steam, and that the bears are in control.
Alongside the loss of the strong support level, current market fundamentals do not favor growth stocks such as PLTR, meaning that bulls will have a really difficult time reclaiming the newly lost support.
Short are valid all the way down to $17, where we may bounce and begin our reversal. I'm currently holding 12/17 18Ps which I picked up for cheap upon the loss of $20.