Reference

a new contribution lands during an active train — fires frequently, budget for spam.

Train State

• [[[event.level]]] — Current level
• [[[event.total]]] — Total points contributed so far
• [[[event.progress]]] — Progress toward next level
• [[[event.goal]]] — Points needed for next level
• [[[event.expires_at]]] — When the train expires

Top & Last Contributor

• [[[event.last_contribution.user_name]]] — Who just contributed
• [[[event.last_contribution.type]]] — "bits", "subscription", or "other"
• [[[event.last_contribution.total]]] — Their contribution amount
• [[[event.top_contributions.0.user_name]]] — #1 contributor (also .1 and .2)
• [[[event.top_contributions.0.total]]] — #1 contribution total

example:

<div class="hype-progress">
  Level [[[event.level]]] - [[[event.progress]]] / [[[event.goal]]]
  [[[if:event.last_contribution.user_name]]]
    <small>Last: [[[event.last_contribution.user_name]]]</small>
  [[[endif]]]
</div>

note: maps to the Twitch EventSub event channel.hype_train.progress.