How to Copy Trades Across Multiple Broker Accounts Automatically

By Sam Davila on 2026-07-10 - 2 min read

Copy trading across brokers means that when a trade executes in one of your accounts, the same trade is placed automatically in your other connected accounts. It solves a real problem: many traders keep accounts at two or three brokers (a retirement account at one, an active trading account at another, a crypto exchange on the side) and manually repeating every trade is slow and error-prone.

How cross-broker copy trading works

A copy trading platform sits between your brokerage accounts. It connects to each broker through that broker's official API, watches for fills in your source account, and then submits matching orders to your destination accounts. The three pieces that matter:

  • Connection method: reputable platforms use OAuth 2.0, so you log in on the broker's own website and the platform never sees your password.
  • Position sizing: a good implementation scales orders to each account's size (for example, 2% of each account) rather than copying a fixed share count into accounts of very different sizes.
  • Latency: the copy happens seconds after the source fill. For long-term and swing trades this is irrelevant; for scalping strategies the slippage can matter.

What to check before you enable it

  • Does every account have enough buying power for the scaled order?
  • Are the same symbols tradable at every broker? Fractional shares and some tickers are not universal.
  • Do you understand the tax difference between the accounts? Copying an active strategy into a taxable account creates taxable events.
  • Can you set a maximum order size or a kill switch? You want a hard cap the first week.

Manual mirroring vs automatic copying

Manually repeating trades takes about a minute per account per trade and fails exactly when it matters: fast markets, busy days, or when you are away from your desk. Automation removes that gap, but it also copies your mistakes instantly, so position-size limits are not optional.

Sentient Logic connects 13+ brokers through OAuth 2.0 and supports copy trading between your connected accounts with per-account scaling. Whichever tool you use, start with small size caps and verify the first few copies by hand.

Educational content, not financial advice. Trading involves risk of loss.