Most Christians will spot the Antichrist when he sits on the golden chair, the throne of God on earth known as the Ark of the Covenant. He will stop animal sacrifice and require all people to take his mark in order to buy or sell. Those are the obvious signs but by then it may be too late.
The problem with not knowing sooner is by then the strong delusion will have already hit so strong that if it were possible (For some it may be) to deceive the very elect!
Many even most people on earth will have already lost their salvation to the beast by then.
Advantages of spotting the Antichrist early:
You can
…begin to prove the Bible accurate by the prophecies of Antichrist
…begin soul-winning immediately
…warn your children, family and friends “This is the man!”

In the broadcasts above, I also explain a startling revelation:
A person can lose their salvation to the beast even though they don’t take the Mark!!!