Against irelia, Avoid trading with Irelia when she has her Passive stacked as she will out trade you. Keep an eye on the little bar under her health.

When trading with Irelia, keep an eye on low health minions in your lane. Irelia may use her Q on the minion to escape the trade or run you down after a skirmish.

Irelia benefits from extended trades. Try and avoid going for extended trades with her as she will always win them. Against irelia, Avoid trading with Irelia when she has her passive piled up as she will take you out. Keep an eye on the small bar under her health. When trading with Irelia, keep an eye on the weak health minions in your way. Irelia can use her Q on the minion to escape the trade or crush you after a skirmish. Irelia benefits from prolonged trades. Try and avoid going for prolonged trades with her as she will always win them.