Orders rejected by the broker in NinjaTrader 8

What is causing it

Insufficient margin for the contract, a position or quantity limit on the account, an order type the broker does not accept, or an instrument you are not permitted to trade.

Why this happens

NinjaTrader forwards your order and reports back what the broker says. A rejection is the broker's risk system speaking, so the resolution nearly always lies with account permissions, margin or limits rather than with the platform.

Funded and evaluation accounts add another layer of rules on top, and those rules are enforced at the broker or firm, not in the platform settings you can see.

The fix, step by step

1. Read the rejection message carefully, because the wording comes from the broker and usually names the actual reason.
2. Check the margin required for that contract, and remember that intraday margin is often much lower than the overnight requirement, which can change during the session.
3. Check whether your account has a maximum position size or maximum order quantity set, which is common on evaluation and funded accounts.
4. Confirm the instrument is one your account is approved to trade, since permissions vary by exchange and product.
5. Confirm the market is open for that contract, as futures sessions include breaks and holidays that differ by product.
6. If the message is unclear, take it to your broker, because only they can see why their system refused the order.

How to confirm it is fixed

The same order, corrected for the stated reason, is accepted and appears as a working order in both NinjaTrader and your broker's portal.

Stopping it happening again

Know your account's margin requirement and position limits before the session, especially near the close when overnight margin applies.