MtGox Live Question

[Threshold]

Does the part I circled in red (where the green line is to the left of the orange line) indicate dark pool transactions?

[Nath]

Not necessarily. The green line is only updated after trades while the yellow is updated on order-book changes. Lines can overlap if new orders are added which are higher than the value of the last trade and no new trade is done for enough time to make it visible.