Backing a call

A call is a position on a real market, backed with your stake at the live price, and published with your name on it.

The steps

1. Tap a side.

   Yes or No, or a team. The call panel opens with the chance, what your stake wins, what you lose if wrong, and the fee.

2. Set the stake.

   $5, $10, $25, $50 and $100, MAX for your whole balance, or type your own, from $1 to $5,000. If it's under this market's smallest order at the live price, Backd tells you the exact figure and sends nothing.

3. Add a thesis.

   One line on why, up to 280 characters. Optional, but it's what people reply to.

4. Back it.

   Your wallet pops up and you sign the order, or one tap does once one-tap orders are on. The server re-reads the price, sends the order to Polymarket, and records the fill.

5. Post the slip.

   The slip appears with Post on X, Save as PNG and Copy link.

The smallest stake

Polymarket's order book takes a smallest order of 5 shares on a market, so the smallest real stake is 5 × the price. About $2.50 at 50%, $4.50 at 90%, $1.00 at 10%. Backd works it out from the live price when you back the call and tells you the exact figure if you're under it. The most Backd sends in one order is $5,000. See stakes and payouts.

What gets saved

The market and the side you took. The price at that second, read live from the order book, and the price your order actually filled at. Nobody, including us, can change either afterwards. Your stake, the shares you hold and the fee paid. Your thesis, if you wrote one. And whether it backed or faded someone else's call, plus who invited you, for referrals.

Your thesis

A thesis is the one-line why. It shows with the call in feeds, on the call page and on the slip. You can add to it later from the call page without changing the call or its price, say when the news moves and you still hold. Updates are dated and shown in order. Anyone can reply under a thesis, from the feed or the call page. Replies are a conversation, not part of the record.

The slip

Every call has a slip: a receipt-style image with the market, your side, “backd at 38%”, what you put in, what it wins, your thesis and your record line. While the call is open it's stamped BACKD. Once it settles it reads RIGHT or WRONG with the money.

Post on X opens a post with a line and your call's link, and X shows the slip as the preview. Want the picture inside the post itself? Save it and attach it. Save as PNG opens your phone's share tray with the image, or downloads it. Copy link copies the call page's link, and previews on X, WhatsApp and the rest show the slip automatically.

You can open the slip again any time from the call page. Slips only exist for calls set to everyone. A friends-only call has no public slip.

The rules

Calls can't be edited or deleted. Wins and losses both stay, and cashing out early is recorded, not erased. You can't back a side that's all but decided (under 0.5% or over 99.5%). Calls close 30 seconds before a market ends, and timed rounds refuse calls once their end has passed. Stakes run from this market's smallest order to $5,000, and orders that don't fill cost nothing. Orders are only placed from places where backing is allowed; see where Backd works. On sample markets, shown only when Polymarket can't be reached, calls are paused.