Trade

A Trade is an action in Street Fighter games where both characters hit each other at the same time

Description
A trade happens when the active frames of two attacks meet the Hurtbox of the opposing character at the same time. As a rule of thumb the properties and hitstun of the point of hit of the attacks will happen for both characters. For example of Ibuki trades with Poison with both characters will take the damage of the other's attacks, Special Attack cancels can not be done when a trade occurs.

Stages of attacks also matter, for example if hit by the first hit of Ibuki's Kazekiri the traded opponent will still be grounded but trading with the second or third hit will launch them in the air. If one of the trading characters was in an airborne state they will either be put into a Juggle state or Air Reset depending on what attack they traded with.

Tactics
While in general nothing can be done by other character there are some instances where trading can be desired. For example Ibuki's standing medium kick can not be comboed out of, but it moves her character model forward. If she trades with it against a light attack due to higher hitstun Ibuki will be able to take advantage of her opponent's higher hitstun and combo into attacks such as Spin Kick due to the closing of space medium kick provides, something that is not enabled by regular Frame Data.