Symbol Mapping: Copying Across Brokers with Different Names
The same instrument is named differently across brokers (EURUSD vs EURUSD.r vs EURUSDm). Here's why that breaks a copy and how symbol remapping fixes it.
28 Jun 2026 · 4 min read
Copy a trade to a follower at a different broker and it sometimes just… doesn't appear. The usual culprit isn't the copier — it's the symbol name. The same instrument is named differently from one broker to the next, and if the follower's broker doesn't recognise the source's symbol, there's nothing valid to place. Symbol mapping fixes that.
Why the names differ
Brokers tag instruments with their own conventions. "EURUSD" on one broker is "EURUSD.r" on a raw-spread account, "EURUSDm" on a micro account, or "EURUSD.pro" elsewhere — same pair, different string. Indices and metals vary even more (US30 vs DJ30 vs WS30; XAUUSD vs GOLD). Suffixes, prefixes and account-type tags all change the symbol the platform actually sees.
What breaks a copy
A copier repeats the exact order it sees on the source. If the source opens EURUSD but the follower's broker only lists EURUSD.m, the order references a symbol that broker doesn't have — so it can't be placed, and a faithful copier skips it rather than sending something invalid. Within one broker this never comes up; across brokers it's the number-one reason a copy silently doesn't land.
Allowlist vs remap
Two related controls solve different parts of this:
| Control | What it does | Use when |
|---|---|---|
| Symbol allowlist | Restricts which symbols copy at all | You only want certain instruments mirrored |
| Symbol remap | Translates source symbol → follower symbol | The follower's broker names it differently |
The allowlist is a filter; the remap is a translation. You typically only need to remap the symbols whose names actually differ between the source and a follower — the rest copy through unchanged.
How remapping works
A remap is a simple rule: "when the source trades EURUSD, place EURUSD.m on this follower." It's applied on the fly as each order is repeated, so a strategy keeps working across brokers with mismatched symbol sets without you renaming anything on the source.
Where Trepeat fits
In Trepeat the symbol allowlist and remap are set per repeater and applied to all its followers, so one source can drive accounts at brokers that name instruments differently. This is what makes cross-broker copying work — see the multi-account trade copier for the broader setup, and MT4 vs MT5 for copying for the platform-side differences that often travel with symbol naming.