Troubleshooting: Order rejected (invalid volume / lot size)

Quick answer

If Logs show “invalid volume”, your receiver broker rejected the lot size.

1. Open Logs and confirm the exact error text
2. Reduce sizing on the connection (Trade Copier → edit connection)
3. Ensure the lot size respects the broker’s min lot and lot step
4. Retry with a tiny test trade

Symptoms

• Logs show:
• “Invalid volume”
• “Invalid lot size”
• “Volume step”
• “Order rejected”
• Some symbols copy, others fail (different lot rules per symbol)

Most common causes

• Receiver broker has a higher minimum lot (e.g., min 0.01 vs 0.001)
• Receiver requires increments (lot step), e.g. 0.01 only
• Your sizing mode produces a lot size outside broker min/max
• Risk-based sizing is calculating too small (or too large) based on SL distance

Fix steps

1) Confirm which connection and receiver failed

In Logs, identify:

• Master account
• Receiver account
• Symbol
• The lot size attempted (if shown)

2) Reduce sizing on that connection

Open Trade Copier:

1. Edit the connection
2. Choose a safer sizing mode temporarily: - Fixed Lots (start small, e.g., 0.01) - or Lot Multiplier (reduce to 0.5 / 0.2 / etc.)
3. Save and retest

3) Watch for symbol-specific rules

Some brokers enforce different lot rules per symbol (especially indices/crypto).

If only one symbol fails, fix sizing for that symbol first (or exclude it until mapped/verified).

Verify it worked

1. Place a tiny test trade on the master
2. Open Logs
3. Confirm receiver shows a green copied event and no rejection

If it still fails (Escalate)

1. Open Copy Not Working? → run quick scan
2. Open a support ticket and include: - Receiver broker name + symbol - The exact error text from Logs - The lot size you attempted

This article is auto-synced from the Danetrades Copier knowledge base. If something is outdated, please contact support.