A standard motion has been tabled, which means he needs two-thirds majority
Here's what the two main event in the Commons look like today:
The magic number is 434 votes (out of 650 votes) and given that opposition lawmakers aren't biting the hook, it looks like Boris Johnson's motion is set for defeat later today. That could possibly build some added positive into the pound in the near-term.
However, as mentioned here, it doesn't mean that a disaster has been averted whatsoever. The threat of a no-deal Brexit is still ever present.