Pairlens is a trading terminal. That word has a specific meaning, and it is worth 30 seconds before anything else.
An exchange is where trades happen. Coinbase, Binance, Kraken and the rest each run a marketplace, hold your funds, and match your buy against somebody else’s sell. A terminal is the cockpit you sit in to watch those marketplaces and act on them. It does not hold your money. It connects to the exchanges you already have accounts with, pulls their live prices onto one screen, and sends your orders back to them.
That split is why professional traders use one. An exchange website shows you its own market and nobody else’s, in whatever layout it decided you want. A terminal shows you every market you care about, side by side, in a layout you built, with the same tools on all of them.
The one rule
Pairlens never touches your money.
Your machine talks straight to the exchange. There is no Pairlens server in the middle holding your keys, marking up prices, or taking a cut of your trades. When you connect an account, the API key you paste in is stored on your own device and used only to sign requests to that one venue. We could not move your funds if we wanted to, because we never hold anything that would let us.
The full source code is public, so you never have to take our word for it.
What you can trade
One terminal, seven kinds of market, all with the same chart, the same order ticket and the same risk limits:
Crypto spot. Buying and selling coins outright on 14 exchanges. This is the plain version of trading: you pay dollars, you own the coin.
Perpetual futures. Contracts that track a coin’s price without ever expiring, usually traded with leverage. Higher risk, and the place most new traders lose money fastest. See perpetual futures.
US stocks and ETFs. Apple, SPY, and everything else on the US market, through a broker called Alpaca. See US equities.
On-chain tokens. Swapping directly on decentralized exchanges from your own wallet, on Solana and five other chains. See DEX and wallets.
Memecoins. The launchpad end of on-chain trading, with its own board for watching new tokens appear and graduate. See memecoins.
Prediction markets. Contracts that pay $1 if an event happens and nothing if it does not, so their price reads as a probability. See prediction markets.
NFT collections. Treated as markets rather than galleries: floor prices, bid and ask ladders, and a sales tape. See NFT collections.
You do not need all of them. Most people use one or two and ignore the rest.
No lock-in, anywhere
Pairlens is not tied to one exchange, one broker, or one country. Use whichever venues work where you live, switch between them freely, or run several side by side. Your accounts stay yours and your data stays on your machine. If you ever leave, there is nothing to cancel and nothing to export from our servers, because nothing of yours was ever on them.
What is in the box
Charts. 16 chart types, 90 indicators, 45 drawing tools, and bar replay for practising on history. See the chart.
Market reading. Order book, trade tape, depth curve and liquidity heatmap. These are the panels that tell you what is happening right now, underneath the candles. See reading the market.
Trading. Market, limit and bracket orders routed straight to your venue, with risk guardrails checked before anything leaves your machine.
Automation. Alerts that watch a level and tell you. Workflows that fire an entry, a stop and a target as one chain. Bots that trade a strategy while you sleep.
Python. Write your own indicators and strategies in real Python, running on your machine. Optional, and nothing else depends on it. See Python scripts.
An AI assistant. One assistant across the whole terminal that can read your charts, explain what a panel is showing, research an asset with cited sources, and propose trades you approve or reject. It can never place an order on its own and it can never move your risk limits. See the AI assistant.
Three ways to run it
In your browser. Open terminal.pairlens.finance and you are on a live chart in seconds. Nothing to install, no account needed. Your credentials live in an encrypted vault inside your browser.
On your desktop. A free app for macOS, Windows and Linux. It stores your exchange keys in your operating system’s own keychain, keeps bots running in the background, and reaches eight venues the browser cannot. This is the strongest place to keep live-trading keys. See the desktop app.
On your phone. The same web address on a phone opens a chart-first mobile terminal with real order entry, not a cut-down dashboard. See mobile terminal.
You can use all three with the same account. Sign-in is optional and only exists to sync your layouts between devices.
Where to start
If you are new to trading. Read the Quickstart, then the terminal tour, then reading the market. Practise with paper trading before you connect real money. Every term you do not recognise is in the glossary.
If you have traded before. Connect an exchange, set your risk guardrails, and build the workspace you actually want.
If you write code. The Plugin SDK adds venues, AI providers and panels. The CLI gives you the same connectors headless, and Fast Financial Charts is the chart engine as a standalone MIT library.
If you are evaluating this for a firm. See self-hosting and the security model.
Ready? Head to the Quickstart.