Futures Copier Contract Roll Checklist (ESU26 → ESZ26)

Copied stacks blow up here for a boring reason: the leader rolls and a follower is still on the dead month. Tradovate can auto-roll charts; official help says that does not move open positions. You flatten or roll every account yourself. MimikTrader does not auto-roll. This is the multi-account ops version.

You own the accounts. MimikTrader is not officially approved by any firm. No pass or payout guarantees. Confirm each firm’s rules and verify in sim.

Bake-off first: test a futures trade copier in sim. After the roll, re-read every platform’s instrument string — year-digit display is not interchangeable.

Cannot tick those? Do not copy at funded size through the window.

Then sim at micro size. Skip 3, 6, or 7 and you are guessing through the window.

A single-account miss is one mess. A copy group has n.

Leader rolled, follower still on the dead month. Leader fills December. One follower is still on September. Calendar spread you did not ask for — or a reject while siblings fill. The book is no longer one trade.

Flatten misses. You flatten the leader. The follower’s size is still last quarter. Flatten hits the new symbol (or a continuous the destination rejects) and leaves size. Public Mimik FAQ: closes, reducing, and flattening are never blocked by risk limits, account locks, or the symbol whitelist — exit permission, not a promise the map is right.

Rejected orders. Expired month, Tradovate’s “liquidation only, contract is about to be expired,” wrong year-digit style, or a continuous on a dated-only API. Public FAQ: the reject is recorded; siblings can keep following unless their rules trip. The missed leg is still a fail.

Charts lie. Tradovate modules can auto-roll so the chart and SuperDOM look current. Official vendor help: neither automatic nor manual rollovers will roll over open positions. You can stare at ESZ26 while the account is still long ESU26.

Partials. One clip on the new month, the next on the old — leftover you will hate.

This is not latency. No millisecond table saves a stale month.

Official Tradovate / NinjaTrader vendor help (Contract Rollovers — Tradovate Web and Desktop): automatic rollovers are enabled by default so workspace modules display the current contract. You can roll a Chart or SuperDOM from the module gear, take the autoroll notification, or prohibit autoroll in Preferences. Neither automatic nor manual rollovers move open positions.

Same vendor family (Contract Rollovers & Expirations): rolling a position means close the expiring contract and open the next month. Equity-index expiration is the third Friday of March, June, September, December. “Liquidation only, contract is about to be expired” means flatten or roll — do not keep sending opens. Working orders stay on the dated contract you submitted; a chart roll does not rewrite them. Cancel and replace on the new month, on each login. The ticket is the truth.

If you also use Tradovate’s native Group Trade, you still flatten or roll each account in the group. Native grouping is not a roll engine.

As of 19 Aug 2026, September 2026 is the typical ES/NQ front. Re-check volume the week you trade.

Treat ~10–14 Sep 2026 as the working window: watch volume from the 10th; do not assume the old front is still the copy symbol after the 14th. Same pair on Nasdaq: NQU26 → NQZ26. Do not invent other tickers. Do not assume ESU6 and ESU26 are interchangeable. Tradovate’s documented pattern is instrument + month + last digit of the year (published example: ESZ4 = Dec 2024). Other UIs show two digits.

Pick one per login: flatten (cleanest copy-group move; you accept a gap) or roll the position (close old + open new; some accounts may lag). Copy groups hate a staggered book. If one follower is still on September while the leader is in December, the next fill is a wrong-month copy or a reject.

Do not “let the copier roll it.” Mimik does not auto-roll. Leader on ESZ26, follower still on ESU26 — that is this page’s failure mode.

After flatten/roll: no leftover size on the old month, no working orders on the old month, and the next opening ticket on each account names the new dated contract.

Leader first. If the leader chart auto-rolled and the leader ticket did not, you will copy the dead month into every follower that still accepts it.

Then each follower. Mixed gateways (Tradovate + Rithmic + ProjectX) are where the string changes — ESZ26 vs ESZ6 vs ESZ6.CME vs a continuous the destination rejects. Do a tiny round-trip after the roll, not last quarter’s notes.

Same root unless you mean ES vs MES. 1 ES ≠ 1 MES. Name the root, name the count, prove both in sim.

Same weekend discipline as a sim bake-off. Add a roll drill.

MimikTrader is one cloud futures trade copier you can run that drill on — not the only option, not “official” anything. This page does not claim Mimik auto-rolls months, auto-maps symbols, or rewrites ES into MES for you. You set the group; you read the sim tickets. Pro risk isolation is per account — useful after the map is right.

As of 19 Aug 2026, from public FAQ / Plans and existing Mimik pages. Starter proves copy + multipliers inside those caps. Pro if you also need live per-account flatten/lock, the journal, unlimited connections, or TradingView webhooks. Neither replaces firm risk. Neither rolls the month for you.

Does Mimik — or any copier — auto-roll ES/NQ for me? Do not count on it. This page does not claim Mimik auto-rolls. Tradovate can auto-roll workspace charts; official help says that does not roll open positions. You flatten or roll each account, then confirm the dated contract on the leader and every follower.

When is the Sep 2026 ES/NQ roll? Watch ~10–14 Sep 2026. CME customary roll is Monday 14 Sep 2026 (expiration Friday 18 Sep 2026). Volume often migrates ~8–10 days earlier. Pair: ESU26 → ESZ26, NQU26 → NQZ26. Re-check volume. Year-digit display varies.

Why did a follower reject after I rolled the chart? Chart ≠ ticket. Expired / liquidation-only month, wrong year-digit style, missing exchange suffix, or a continuous on a dated-only API. Read the reject; flatten leftovers. Public FAQ: Mimik does not block closes; siblings can keep copying unless their own rules trip.

Flatten every account or try to roll size across? Flatten is the clean copy-group move. Rolling size only works if you can do it on every login before the next leader fill. A staggered book is a spread.

Pass, payout, or official approval? No. Not a signal service. No eval-pass or payout guarantees. Independent software — firm names are compatibility context only. Verify with the firm. You own the accounts.

Starter or Pro just to run the roll drill? Starter ($29/mo) for copy + multipliers inside 5 connections / 5 groups. Pro ($49.99/mo) for the risk suite, journal, unlimited connections, or TradingView webhooks.

Write the four checks on paper: flatten or roll every account, front-month on leader and each follower, sim one micro on the new contract, only then size. Run that drill on whatever copier you already have. If you want a cloud stack for the bake-off, MimikTrader’s 7-day free trial is the soft path (card required, cancel anytime).