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Triggering a Cassie trade takes one reply. Find any post on X that makes a directional market claim — a price target, an odds read, a momentum call — reply to it with @cassiedottrade trade this, and Cassie’s AI pipeline takes over. Within seconds to a minute, Cassie replies on X with either a trade confirmation or an explanation of why no trade was taken.

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What makes a good signal

Cassie reads the original tweet you replied to, not just your reply text. Your reply is the trigger; the source post is the signal. For the best results, pick posts that have:
  • A clear directional thesis — a price level, a percentage move, a YES/NO outcome
  • A named market anchor — a specific token, an event, or a prediction market question
  • Some conviction in the language — “this is the one”, “locking in”, “quiet grind back above”
Posts that just say “crypto is interesting” or “markets are weird today” are too vague. Posts like the ones below give Cassie enough to work with.
Start with posts that name a specific asset or market and state a clear direction. The more concrete the thesis, the better Cassie can match it to a live market.

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Basic syntax

Reply to any post with: 
@cassiedottrade trade this
That’s the full command. Cassie derives everything else — asset, venue, direction, and size — from the source tweet and your account defaults.

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Example: a good mention

@maya_trades · 11m
SOL ETF approval odds quietly grinding back above 60c on Polymarket.
Volume's there, this is the one.

└── @cassiedottrade trade this
In this example Cassie reads the parent tweet, identifies a Polymarket prediction market on SOL ETF approval, confirms the YES side is supported by the thesis, and places a buy order.

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What happens after you mention

1

Cassie picks up your mention

Cassie polls X for new mentions every minute. Your reply is detected and queued for processing.
2

The AI pipeline analyzes the signal

Cassie reads the source tweet, extracts the directional thesis, searches Hyperliquid and Polymarket for candidate markets, and scores each expression for fit.
3

A trade is placed or declined

If a clean match is found, Cassie places the order from your Privy wallet at your default trade size. If nothing fits, Cassie still replies on X explaining why.
4

Cassie replies on X

You receive a public reply from @cassiedottrade confirming the fill — ticker, side, entry price, and venue — or explaining the no-trade decision.

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One mention = one trade attempt

Each @cassiedottrade trade this reply triggers a single trade attempt using your configured default trade size. To place another trade, mention Cassie again under a different post.
Cassie may reply “no trade” if the signal is ambiguous, no clean market match exists on either Hyperliquid or Polymarket, or if internal risk checks fail. A no-trade reply is not a failure — it means Cassie evaluated the signal and found no high-confidence expression. Read the reply for the specific reason.