At the end of Arrow S04E19 we see that
Barry still has his speed, when he runs off after Oliver says "I want to be alone".
So where does this Arrow episode occur in time, in relation to the Flash? Because as of The Flash S02E18's ending we know that
Barry no longer has any speed force, Zoom siphoned it in exchange for Wally West.
So where does this episode of Arrow occur in relation to the CW-verse timeline?