I’m not sure why so many traders refuse to use accepted scientific terms correctly. Here’s the latest couple of times I’ve seen the terms leading and lagging used incorrectly on a forum:
Don’t fall into this trap! If you want to communicate with people, you speak their language to the best of your ability. If you go around using words incorrectly:
On blatantly, I turnip my simulating.
… you can only converse with your fellew clueless. In the eyes of everyone else, you are embarrassing yourself. My all-time biggest pet peeve in this category is the word fractal, but lagging has been climbing the charts recently.
P.S. if you are wondering, investopedia is just one of many places with a decent definition of leading and lagging as properly used in finance and economics.