traderline

traderline, styled Traderline by its operator, is a desktop trading application for Polymarket, built by the same team that makes ladder-trading software for Betfair's sports exchange. It is not a bot, a browser extension or a wallet; it is a downloadable Windows and Mac program that a trader installs alongside an existing Polymarket account and wallet, bringing the same vertical-ladder order entry the operator built for Betfair traders onto Polymarket's order book.

On Predicts.guru's own measurements, Traderline sits at #3 among tracked builders by all-time attributed volume, with $538.7M routed since 2026-04-28 and $21M in the most recent week. Order flow leans toward sports, most recently concentrated in Will Eyüpspor win on 2026-08-30. An average fill of $243 and a mean of 148 distinct traders a day point to a retail audience running ladder-style orders rather than a handful of large desks, and a buy share of 59% shows more of that flow opening positions than closing them.

A trader starts on Polymarket itself, not inside Traderline: the tutorial on the operator's site walks through opening a Polymarket account, verifying an email code, accepting Polymarket's terms and depositing funds by card, Apple Pay, Google Pay, Revolut Pay, PayPal or crypto, all on polymarket.com. Only after that does Traderline enter the picture.

Connecting requires exporting the private key from the Magic-based wallet Polymarket created during sign-up and pasting it into the Traderline desktop app to link the two. The operator describes Polymarket as non-custodial, meaning funds sit in the trader's own wallet rather than with Traderline, but the connection step still means handing a raw private key to a piece of desktop software. From there, orders placed on Traderline's ladder route to Polymarket's own order book under Traderline's builder code; the exchange, not Traderline, holds and settles the position.

The app itself runs only as a downloadable Windows or Mac client for Polymarket; there is no browser version or Telegram bot in the evidence, and the operator's Telegram presence is a broadcast channel for release announcements rather than anywhere trades happen.

• Vertical ladder order entry

  Orders go in through a vertical price ladder instead of a typed order form, the same click pattern Betfair scalpers use, which suits fast in-and-out trading over careful order sizing.

• Same ladder across two exchanges

  The same ladder skills carry over between Betfair and Polymarket, so a trader who already scalps Betfair markets does not have to relearn an interface to trade Polymarket.

• No subscription or premium tier

  Traderline charges no subscription or premium fee on either exchange it supports, so ladder access does not depend on an upgrade tier or paywall.

• Markets that don't suspend

  Polymarket markets do not suspend the way Betfair's in-play markets can, so ladder orders stay open through fast price moves instead of getting locked out.

Betfair scalpers moving to Polymarket

Traders who already scalp Betfair's ladder can carry the same click habits into Polymarket without learning a new order interface.

Traders wary of subscription tools

Traderline charges no subscription or premium fee, which matters to traders who don't want a recurring cost stacked on top of trading itself.

Sports-heavy Polymarket traders

With sports leading its recent volume and Will Eyüpspor win on 2026-08-30 its top market, traderline draws traders who follow those markets closely as they move.

Retail-sized ladder traders

An average fill of $243 and 148 distinct traders a day describe a crowd placing dollar-sized clicks rather than four-figure blocks.

Desktop-based day traders

Because Traderline only ships as a Windows or Mac client, it fits traders who sit at a computer to trade rather than needing a phone-first app.

The operator's own claim is that Traderline carries no subscription and no premium charge on either exchange it connects to, a stance repeated across its marketing since the Polymarket launch. What it does not do is publish a fee schedule for that connection: traderline curates no advertised rate, so a trader cannot check an official number before routing an order. Polymarket sets its own trading fee per market, and that fee is identical no matter which builder carries the order, so it is not something Traderline controls or discloses. Before depositing, a trader should treat the absence of a published rate as a reason to watch the fill confirmations themselves rather than assume the software's price is zero.

• It costs nothing beyond Polymarket's own per-market trading fee, since the operator publishes no subscription or premium charge for the software itself.
• The ladder interface carries over from Betfair, so traders with tick-by-tick scalping habits do not have to relearn an order screen.
• Its desktop-only build for Windows and Mac keeps the trading screen dedicated to price action rather than sharing a browser tab.
• Polymarket markets stay open through fast moves instead of suspending the way Betfair's in-play markets can, per the operator's own comparison.
• An average fill of $243 and 148 distinct traders a day suggest a broad retail crowd rather than dependence on one or two large accounts.

• Connecting requires exporting and pasting a raw Polymarket wallet private key into a third-party desktop program, a step that carries real exposure if the machine running Traderline is compromised.
• The operator publishes no fee schedule for using Traderline itself, leaving a trader to find out what changes at the point of connecting rather than beforehand.
• There is no browser or mobile version for Polymarket in the evidence, so a trader without a Windows or Mac machine cannot use it there.
• Its Telegram presence is a broadcast channel rather than a bot or live chat, so it is a place to read announcements, not to get support in real time.
• The registered-trader and country counts on its own homepage are stamped to a stated month, not updated live, so they describe a snapshot rather than the platform's current size.

Polymarket itself stays non-custodial in this setup: funds sit in the trader's own wallet, and the operator describes Traderline as connecting to that wallet rather than holding balances. The exposure sits in the connection method, exporting a Magic-wallet private key and pasting it into a downloaded desktop program, which hands a sensitive credential to third-party software rather than an OAuth-style link. Traderline carries a verified profile on Polymarket, which at least ties its order flow to a declared identity, but the operator's Telegram channel is a one-way broadcast, so a trader checking for live incident updates or a support conversation will not find one there.

Traderline is a straightforward bet: a free, desktop-only ladder that lets Betfair traders bring familiar clicks to Polymarket without paying for the privilege. At #3 by all-time attributed volume and with 148 traders routing through it daily, it has real, ongoing use rather than being a one-market experiment. The connection step, exporting a Polymarket wallet's private key into a downloaded program, is the part worth sitting with before depositing serious size. Traders who like ladder trading and are comfortable with that key-export step have reason to try it; traders who want a browser-only or mobile-first tool, or who won't export a private key to any third-party app, should look elsewhere.

• Is traderline safe to connect to Polymarket?

  Polymarket funds stay in the trader's own non-custodial wallet, but connecting means exporting that wallet's private key into a downloaded desktop program, which is the real exposure to weigh.

• Does traderline charge a fee?

  The operator states no subscription or premium charge for using Traderline; it publishes no separate fee schedule, and Polymarket's own per-market trading fee still applies regardless of the builder used.

• What is traderline?

  Traderline is a downloadable Windows and Mac trading application that adds Betfair-style vertical-ladder order entry to an existing Polymarket account and wallet.

• Is traderline available on mobile?

  The evidence shows only a Windows and Mac desktop client for Polymarket; no browser version or Polymarket mobile app appears on the operator's own pages.

• How does a trader connect traderline to Polymarket?

  A trader creates and funds a Polymarket account first, then downloads Traderline, exports the private key from the Magic wallet Polymarket created, and pastes it in to connect.

• What are alternatives to traderline?

  Other builders on Predicts.guru's leaderboard route the same Polymarket order book under their own codes; comparing $21M and 148 across builders shows which ones carry active, recent flow.

• Is traderline's Telegram channel a trading bot?

  No. Its Telegram presence is a broadcast channel for release announcements with a modest subscriber base, not a bot that places or manages trades.