NinjaTrader trade copier: copy NT accounts at the API, not with an add-on

By Kenten Kronemann (Kenny Trades) · Last updated October 1, 2026

A NinjaTrader trade copier mirrors one NinjaTrader account onto others. Most are NT8 add-ons that run on your machine. NinjaTrader brokerage accounts run on Tradovate’s infrastructure, so Trading Floor copies them at the API with OAuth — no add-on, no desktop running, no per-machine licence — and your NT accounts join the same floor as your Apex, Topstep, Rithmic and Volumetrica accounts.

Add-on copiers vs API copiers

The classic way to copy NinjaTrader accounts is an NT8 add-on. Replikanto is the best-known and it is genuinely good at that: ATM strategy copying, several quantity modes, a lifetime licence. The add-on copies inside the platform, which means NT8 must be running on every machine involved, your machine (or a VPS you rent) is the uptime, and the copier can only reach accounts NT8 can log into — TopstepX and Volumetrica accounts aren’t among them. The API way skips the desktop: because NinjaTrader’s brokerage runs on Tradovate infrastructure, a cloud copier mirrors fills across those accounts server-side. Your charts stay in NT; the copying doesn’t have to. Our honest Replikanto comparison says who should pick which.

How it works with NinjaTrader brokerage accounts

Connecting Tradovate accounts: OAuth

Tradovate-based accounts connect with Tradovate’s own OAuth flow: you sign in on Tradovate’s page, approve access, and come back. Trading Floor never sees the password — it holds a token you can revoke from Tradovate at any time — and every account under that login (an Apex eval, a MyFundedFutures account, a personal account) appears on the floor at once. The connection takes about 90 seconds. NinjaTrader brokerage accounts run on Tradovate’s infrastructure and connect the same way.

If your NinjaTrader is connected to a Rithmic-based prop account rather than NT brokerage, connect that Rithmic login instead — same result, no plugin. See the Rithmic page.

What gets copied

The engine mirrors the leader’s net position per contract onto each follower, scaled by that follower’s multiplier and clamped by its max-contracts cap. Entries, scale-ins, partial exits, flattens and reversals all land on every follower, sized for that account. Mirrored stop and target legs go out as one broker-side OCO pair on Tradovate; on TopstepX, Rithmic and Volumetrica they are two orders, and the copier cancels one when it sees the other fill. A limit entry is mirrored as a limit and given a few seconds to fill at your price before the engine backstops it, and your first live session runs under Safe Start: one contract per follower until you lift it or set that account’s cap.

How fast, and how you check

Every copy prints two numbers in your Copy Log: the engine’s own share (detect the fill, size each follower, submit) and the broker’s wire time, attributed separately so a slow gateway is never disguised as engine speed — or vice versa. The platform-wide median copy, the engine’s p95 and the share of copies above the disclosed 200ms cutoff are published live from real production orders (54ms median copy, fill to follower). Copy delay is slippage handed to every follower on every entry, so we show the number instead of describing it.

Risk guardians, per account

Each follower carries its own drawdown, daily-loss and profit-target guardian. Set a guardian a cushion inside the firm’s number and a breach auto-flattens that account and stops copying to it — while the rest of the floor keeps running. The firm presets (Apex, Topstep, MyFundedFutures, Tradeify and others) apply in one click and use the same drawdown model as the free trailing drawdown calculator.

How to set up a NinjaTrader trade copier, step by step

1. Create a Trading Floor account at /signup and pick a plan: Starter ($25/mo) runs up to 20 accounts across two broker logins, Pro ($50/mo) runs 120 across unlimited logins. The first month is free.
2. Connect the login that holds your leader. NinjaTrader brokerage accounts connect with Tradovate’s OAuth flow (NT brokerage runs on Tradovate infrastructure); Rithmic-connected NT accounts connect with your Rithmic login.
3. Connect every follower login the same way. Mixed floors are normal: NinjaTrader accounts next to accounts at other firms, personal accounts, or a TradingView strategy as the signal source.
4. Crown the leader and enable followers. One account leads; tick the accounts that should mirror it. A disabled account is left completely alone.
5. Size each follower. Set a multiplier (or a fixed contract count) and a max-contracts cap per account, so a 50k eval and a 150k funded account never share one setting.
6. Arm the guardians. Apply the NinjaTrader preset, then nudge the drawdown and daily-loss lines to leave the cushion you want. Guardians act per account at your line.
7. Run Test floor, then Start. Test floor checks every connection and your copy wiring without placing an order. First session: Safe Start holds followers at one contract until you set a cap.
8. Trade the leader normally and read the Copy Log. Every copy shows its fill, its engine latency and the broker’s wire time; rejections and skips appear with a reason instead of vanishing.

NinjaTrader copiers compared

Every copier here lists NinjaTrader, but “supports NinjaTrader” means two different things: an add-on that copies inside NT8 on your machine, or an API connection to the brokerage underneath. The facts are from each vendor’s own pages on October 1, 2026.

Keep NinjaTrader for what it’s great at

This isn’t NT-versus-us: trade from NinjaTrader’s charts and DOM all day. Trading Floor sits underneath, mirroring your leader’s fills across the floor — NT-brokerage accounts next to TopstepX, Rithmic and Volumetrica ones — and journaling the results with a P&L calendar and verified share cards. If you also automate TradingView strategies into NT8, CrossTrade is the best bridge we know of and some traders run both: see the CrossTrade comparison.

Is copying allowed on your firm’s accounts?

Almost every futures prop firm allows copying between accounts you own and trade yourself and prohibits copying anyone else; the differences are in account caps, direction rules and which account types may mirror. Platforms don’t set those rules, firms do — so check your firm’s current rules before you mirror. We keep a sourced, dated table at prop firms that allow copy trading, and each firm page quotes the firm’s own help centre: Apex, Topstep, MyFundedFutures and Tradeify.

What it costs

Starter is $25/month for up to 20 accounts across two broker logins; Pro is $50/month for up to 120 accounts across unlimited logins. Yearly billing is ten months’ price. There are no per-account fees and nothing to host. Between evals you pause instead of cancelling — settings, journal, payout tracker and streaks wait for you. The first month is free, so the honest way to evaluate it is to run one real session and read your own Copy Log. Plans in plain text: /pricing.md.