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The right moment, made obvious.

A trading desk built from the ground up for scalpers. Multi-monitor, a local AI agent to think out loud with, and the broker you choose.

Apply for early access See what's different

Private beta · paper trading · Windows

OnMars · DeskSimulatedAutoplay
TSLA 355 CallSample session
5.65+0.60 +11.88%Bid × Ask5.60 × 5.70Size49 × 177
Size
Risk / ct
PositionOpen

1 long @ 5.40 · mark 5.65

+$25.00

Realized $0.00 · Total +$25.00

Cold start~0.4sFrom launch to a live desk
Charts60fpsFrame work p95 2.7 ms
Quote to screen17msp95 during a 200 Hz burst
Risk shown in$Dollars first, not ticks

Measured on the development machine, August 2026. Order execution time depends on your broker.

The ladder

Your orders live on the book.

Target and stop sit on their own price rows, next to the best bid and ask sizes. When the market trades through a row, you see it happen — no hunting through an order list.

TP
Your target, working as a sell order
STP
Your stop
LONG 1
Where you got in, and how many
1
Contracts working at that price
41 53
Size at the best bid and ask
SimulatedTSLA 355 Call · Ladder
Bid × Ask5.60 × 5.70Size49 × 177Position1 long @ 5.40 · mark 5.65

Candles and ticks

Every trade, when speed matters.

Switch from one-minute candles to the tick chart and every print in TSLA shows up as it happens, with VWAP and the session's volume profile beside it. The option trade from the desk above is marked where it filled.

SimulatedTSLA · underlying of the TSLA 355 Call
TSLASample session
355.80+1.20 +0.34%VWAP354.51Last trade40 @ 355.80

Risk in dollars

Know what it costs before you click.

Stops and targets are set in dollars, not ticks. The position card counts the result in dollars too, marked at the mid on every quote. Change the risk and the stop moves on the desk above.

SimulatedPosition
TSLA 355 Call · Sample sessionOpen

1 long @ 5.40 · mark 5.65

+$25.00

Realized $0.00 · Total +$25.00

Stop costs −$30 · target pays +$40

Risk per contract

Simulated fill. Position changes only on confirmed fills.

What's different

Built for the fastest traders. Honest about what's ready.

Every feature shows its real status. Live in beta means it's in the build testers get.

  • Live in beta

    Built for options scalpers

    One underlying, one contract, one active trade. The next safe action is always obvious.

  • On the roadmap

    Futures, next

    Designed from day one to carry futures: per-contract ticks, multipliers and sessions.

  • Live in beta

    Native speed

    A desktop app, not a web page. Cold start around 0.4 s, charts at 60 fps.

  • Live in beta

    Every screen has a job

    Spread the desk across your monitors — watchlist, desk, chain — without losing the thread.

  • Live in beta

    A local AI agent to think out loud with

    Talk through a potential or open trade in plain language. It advises; it never places, changes or cancels an order.

  • On the roadmap

    Orders by voice

    Say it, see it staged, confirm it. Voice is a command you approve — not an AI trading for you.

  • Live in beta

    Your charts, on the big screen

    TV mode puts a clean, fullscreen chart dashboard on a compatible wireless TV. Your trading controls stay on your computer.

  • Building now

    Not tied to one broker

    OnMars connects through adapters, so you keep the broker you trust. tastytrade first.

All features and their status

Local AI agent

Live in beta

AI advises. You decide.

Talk through a potential or open trade in plain language, like you would with a desk partner. Use a local model or your own provider.

  • Never sends, changes or cancels an order.
  • Never sits in the path of an exit. Flatten always works.
  • Paper and live are unmistakable. Live is never inherited from yesterday.
  • Stale data blocks new orders.
  • Core trading and risk controls run without the AI or the cloud.
AGENT · READ-ONLYPAPER

Thinking about SPY 580 calls here. What am I missing?

Spread is two cents, fine. But SPY is sitting under yesterday's high at 579.80 — rejected there twice this morning. A stop below 578.90 would cost about $110 on two contracts.

So wait for the break.

That's the cleaner entry. Your call.

Multi-monitor · TV mode

Every screen has a job.

Watchlist and agent on the left, the desk in the middle, chain and orders on the right — and your charts, fullscreen, on the TV across the room.

Live in betaMulti-monitorLive in betaTV mode
Three monitors showing the watchlist, the desk and the option chain, plus a TV showing a fullscreen chart dashboardWatchlist + agentThe deskChain + ordersTV mode

Your charts, on the big screen.

TV mode puts a clean, fullscreen chart dashboard on a compatible wireless TV.

  • Larger labels, no toolbars — just the charts.
  • Remembers your display and chart layout, so it opens with one click when the TV is connected.
  • Your trading controls stay on your computer.
  • TV disconnected? OnMars opens Windows Cast and moves the charts over once you reconnect.

Early access

Practice with no real money.

Applications are open now. Invited testers will use the real desk on replayed market sessions — with no real money.

  1. 01

    Apply

    Six short questions. About two minutes.

  2. 02

    Join the review queue

    We review applications manually. Applying does not create a tester account.

  3. 03

    Wait for an invitation

    Tester invitations and Windows downloads will follow in a later phase.

  4. 04

    Help shape the desk

    Invited testers will practice in paper mode and share feedback. The tester portal comes later.

Roadmap

What we’re building next.

  1. Building now

    Broker adapters

    Connect the broker you already use. tastytrade first, more after.

  2. On the roadmap

    Futures scalping

    The same desk for futures: tick rules, multipliers and sessions per contract.

  3. On the roadmap

    Voice orders

    Say the order, see it staged, confirm it. You stay in control of every send.

See the full roadmap

Be early.

Applications are open. Tester invitations and Windows downloads will follow.

Apply for early access