When a limit or stop order is modified to a price close to the current bid/ask, the broker may reject the modification, ignore it, or process it differently on different accounts — leaving the leader and one or more followers in different position states. This drift is irreversible: no subsequent fill event will realign accounts automatically.
This is broker-side behaviour, not a Tradecopia failure. Tradecopia replicates order actions — it cannot override how a broker processes a modification that arrives near market price.
You might be experiencing this if:
You moved a limit or stop order close to the current price and follower positions are now different from the leader
Some accounts filled or stayed flat while others didn't after you adjusted an order level
Accounts drifted apart right after you dragged an order near the market
What happens when you modify an order near market price
You place a limit or stop order
You modify the order to a price close to the current bid/ask
The broker evaluates the modification — the closer the order is to market price, the more likely it is to be rejected, rerouted, or processed inconsistently
Because each account is processed independently by its own broker, the outcome may differ: the leader's modification is accepted while a follower's is rejected, or vice versa
Leader and follower now hold different order states — the copy group is out of sync and cannot be automatically corrected
Note: The closer your order is to the current market price, the higher the probability of inconsistent execution across accounts.
Why brokers reject near-market modifications
Brokers enforce rules around order proximity to the current price. Common triggers for rejection or inconsistent processing:
Moving a limit order directly onto or through the current bid/ask
Placing a stop so close to the current price that it could trigger immediately
Rapidly modifying an order multiple times in quick succession near price
What happens on the broker side varies: the update may be rejected outright, the order may be converted internally, or execution may proceed differently than expected. Each broker handles this independently — which is why two accounts receiving the same instruction can end up in different states.
How to avoid this
Use market orders when you are near price. If execution timing matters and you are close to the current market, a market order provides the most consistent behaviour across accounts — it executes immediately and avoids the broker's near-market modification rules entirely.
Give your limit and stop orders a buffer. Avoid dragging orders to within a tick or two of the current bid/ask. Allow the market to come to the order naturally rather than chasing price with modifications.
Avoid rapid successive modifications. Each modification is processed independently by every broker in your copy group. Frequent updates near price multiply the risk of at least one account receiving a different outcome.
Monitor at least one follower account in real time. Confirm that key order modifications have been applied consistently across accounts before continuing to trade.
Bid/ask spread differences between accounts
Even when modifications are accepted, limit orders interact with the bid/ask differently on different broker accounts. Spread differences can cause one account to fill while another remains pending on the same order price.
Example: A buy limit set at the ask on Broker A fills immediately. The same order sits at the bid on Broker B and does not fill.
This is normal market structure behaviour — not a replication error. The order was relayed correctly; the difference is in how each broker's matching engine processes it against available liquidity.
Stop orders vs. market orders
Order type | Behaviour |
Stop order | Triggers when price reaches the stop level, then executes as a market order. Can slip. Behaviour varies across brokers — no guaranteed exact fill price. |
Market order | Executes immediately at current price. Most consistent behaviour across accounts. Best choice when synchronisation matters. |
Related articles
How to prevent recurring replication issues and keep your accounts in sync — session habits that prevent this and other root causes
Why didn't my trade execute as expected? — full root cause catalogue for execution issues
How the Position Reconciler protects your follower accounts — automatic detection and exit of position mismatches