Those shorties really "fried in hell" the last few days with the big pump over 2 silly BOD's.

Short Interest (Shares Short) 5,000
Short Interest Ratio (Days To Cover) 0.2

Short % Increase / Decrease -44 %
Short Interest (Shares Short) - Prior 8,900

Link for proof as always:
http://shortsqueeze.com/shortinterest/stock/PTOI.htm

Second source:

Plastic2Oil Inc (OTCPK TOI) Short Interest: 0.00%, 0.00 Mil (As of Today)
=GURUF("OTCPK TOI","Short Interest"
Short interest can be expressed as a percentage by dividing the number of shares sold short by the total number of outstanding shares. As of today, Plastic2Oil Inc's Short Percentage of Float is 0.00%.

Short interest can also simply be expressed as the number of shares sold short by investors but not yet covered or closed out.

Link:
https://www.gurufocus.com/term/ShortInterest/...ic2Oil-Inc