Differences between TradingView/Tradovate and NinjaTrader OCO exit orders

This article explains how OCO (One Cancels Other) exit orders behave differently in TradingView/Tradovate and NinjaTrader, and what this means when you copy trades with Replikanto. Understanding this difference is critical because it affects how stop-loss and take-profit orders are managed in your follower accounts.

How OCO orders work

OCO orders link two exit orders together — typically a take-profit (TP) and stop-loss (SL) — so that when one is filled or canceled, the other is automatically handled. However, the way this works differs between platforms.

NinjaTrader OCO behavior

The One Cancels Other functionality ties two resting orders together, so that when one is canceled or filled, the other will be canceled automatically. This is a more comprehensive approach to exit order management.

TradingView/Tradovate OCO behavior

TradingView uses OCO differently — it only cancels the other order when one is filled by the market. If you manually cancel one of the exit orders that is part of an OCO group, it will not cancel the other. For example, if you manually cancel the TP exit order, the SL exit order will remain active.

Side-by-side comparison

Implications for Replikanto users

When you use Replikanto to copy trades from TradingView or Tradovate Web, there's an important behavioral difference you need to understand.

How Replikanto handles OCO orders

Replikanto places exit orders using NinjaTrader's OCO logic — even when copying from TradingView or Tradovate Web. Each exit order group gets an OCO ID to keep them linked, matching the lead account's structure.

That OCO ID belongs to one follower account only. The stop and the target of a follower's bracket share the same ID, and no other account (neither the leader nor another follower) uses it. So when an exit fills on one account, NinjaTrader cancels only that account's other exit, not a working order on another account, even when several accounts are on the same broker connection (for example, several prop firm accounts under one Rithmic or Tradovate login).

Replikanto versions before 1.7.0.0: with Stealth Mode or ATM Copy on, followers on the same broker connection could share the leader's OCO ID, so a fill on one account could cancel a working order on another. This was fixed in Replikanto 1.7.0.0, where each follower's orders use their own OCO group. If you use Stealth Mode or ATM Copy with several accounts on one connection, update to 1.7.0.0 or newer.

The risk scenario

Here's where the difference matters: when a trader manually cancels one exit order (say, the TP) in TradingView or Tradovate Web:

• In TradingView/Tradovate: The opposite order (SL) remains active — the trade stays protected.
• In NinjaTrader (where Replikanto places the orders): Both orders are canceled — the follower account is left with no exit orders at all.

What this means for your trading

If you're not actively monitoring your follower accounts, you could end up with an open position that has no stop-loss or take-profit protection. This gap in coverage can lead to significant unexpected losses.

Recommendations

• Monitor follower accounts closely: Especially when you manually modify or cancel exit orders in your lead account.
• Set up alerts: Configure notifications for positions without exit orders in your follower accounts.
• Review after manual changes: After manually canceling any exit order in TradingView/Tradovate, immediately check your follower accounts to verify exit order status.
• Consider automation: Use risk management tools that can detect and alert on positions missing exit orders.

Example scenario

You're copying trades from TradingView to a NinjaTrader follower account. You enter a long position with TP at 1.1000 and SL at 1.0950. Later, you manually cancel the TP in TradingView because you want to let the profit run. In TradingView, the SL stays active and your position remains protected. In your NinjaTrader follower account, Replikanto cancels both orders per NT's OCO logic — leaving the position completely unprotected. Without active monitoring, you won't know your follower account has no exit orders until it's too late.