I'd always wondered how in ThinkOrSwim they came up with the "Expected Move Differential" function which is
available to use as a "Marketwatch" "Quotes" column only. There was just a general description in the TOS reference material.

Then one day I happened to see this video on youtube where the TOS founder explains it in detail on a Tastytrade clip:

Option Trading Math - Calculating Expected Move and Probability of Success - YouTube


update:

np, BM. Attached .jpg showing the "Expected Move Diff" column in Marketwatch pane to better show what I'm referring to.

Don't use tos haven't seen video, but from name only sounds like their version of a measured move

Sent from my Nexus 4

Ah nope they are talking options. My bad

Sent from my Nexus 4