I noticed a recent question used the tag [btc-trading-corp]
IMPORTANT NOTICE TO ALL EX BTC-TC TRADERS
BTC Trading Corp has partnered with TxQuick to relaunch the website as a crypto to crypto blockchain trading platform. The demo site is now live. Feel free to sign up and give it a spin.
All the other uses seem, from a superficial glance, to be errors where perhaps the OP selected any tag that came up when they typed "trading".
I suggest this tag be removed.
I would have suggested replacing current uses with [trading] - but I'm not sure [trading] is a particularly useful tag.