Mad@gascar
Teslanaire Extraordinaire
...
Investopedia and Wikipedia are not particularly good sources when it comes to market mechanics.
The uptick rule is public and unambiguous:
Press Release: SEC Approves Short Selling Restrictions; 2010-26; Feb. 24, 2010
"At that point, short selling would be permitted if the price of the security is above the current national best bid."
Btw., trade execution/matching software generally has very little notion of "last price" or "transaction", almost all functionality is based on the order book state - where bid/ask are the top entries of the order book.
Fact Checking's facts check out, after all! Thanks for the fact checking, Fact Checking!