Heat is this site's own measure of how busy a token is right now, from 0 to 100. It weighs the pace of the volume, the share of buys, the move of the price, the crowd that trades and the turnover of the pool. It was never backtested and does not predict price.
Running hot means heat of 60 or more and no red flag.
A red flag names a trap that was measured on the token: a honeypot, liquidity that can be pulled, a dev that rugged before, and the like. A caution is a fact worth knowing that is no trap by itself.
The list comes in three parts, whatever it is sorted by: first the tokens that passed the checks, then the ones not checked yet or with a caution on their trading, then the ones with a red flag. A token passed the checks when a scanner answered whether it can be sold, nothing found is a red flag and its trading looks like a market.
No flag found does not mean safe: a token can pass every check and still go to zero. Nothing on this page is a recommendation.