Summary
If you run multiple EAs or multiple strategies on the same MT5 account, you need to make sure each bot only counts and manages its own trades.
Otherwise, one EA may count trades from another pair or strategy and stop trading too early.
Example problem:
Your EURUSD bot sees an open GBPUSD trade
→ Count Trades thinks a trade is already open
→ EURUSD bot does not open a new trade
To avoid this, use filters such as:
Symbol
Group Number
Magic Number
Also known as: one trade per pair, one trade per symbol, limit trades by pair, Count Trades counts all trades, isolate EA trades, multiple EAs on one account, Magic Number, Group Number, symbol filter.
The simple rule
Use Count Trades before opening a new trade.
Use Select Trades before managing or closing existing trades.
Count Trades = blocks new trades
Select Trades = manages existing trades
If you only want the EA to check or manage one pair, set the Symbol filter.
If you only want it to check or manage one strategy, use a unique Group Number or Magic Number.
Why this matters
When multiple EAs run on the same MT5 account, they can interfere with each other if they are not separated correctly.
Example:
EA 1 trades EURUSD
EA 2 trades GBPUSD
EA 3 trades XAUUSD
If Count Trades is set too broadly, EA 1 may count trades from EA 2 or EA 3.
That means your EURUSD bot may stop trading because another EA already has a trade open somewhere else.
This is usually not what you want.
Count Trades vs Select Trades
Count Trades
Use Count Trades before an execution block.
Purpose:
Check how many trades or orders already exist before opening a new one.
Typical order:
Run per Candle
→ Trade Rule
→ Count Trades
→ Buy Now / Sell Now / Pending Order
Use it to prevent:
Duplicate trades
Too many open positions
Multiple entries on the same symbol
Multiple entries from the same strategy
Select Trades
Use Select Trades before a management block.
Purpose:
Choose which existing trades or orders should be modified, closed, or managed.
Typical order:
Run per Tick
→ Select Trades
→ Check Profit/Loss
→ Modify SL/TP / Close Trades / Delete Pending Orders
Use it to manage only specific trades, for example:
Only EURUSD trades
Only buy trades
Only trades from Group 1
Only pending orders from one strategy
Only trades opened by one EA
The three filters you need to understand
Symbol
The Symbol filter tells the block which trading pair, asset, or instrument to look at.
Examples:
EURUSD
GBPUSD
XAUUSD
US100
BTCUSD
Important: the symbol name must exactly match the broker’s symbol name in MT5.
Some brokers use suffixes or custom names, for example:
EURUSD
EURUSD.
EURUSDm
EURUSD.pro
XAUUSD
XAUUSDm
US100.cash
If your broker calls the symbol EURUSDm, then entering EURUSD may not match.
Use the exact symbol shown in MT5 Market Watch.
Group Number
A Group Number is used to separate trades inside your strategy.
Example:
Group 1 = entry trades
Group 2 = scale-in trades
Group 3 = hedge trades
This is useful when one EA has different trade types and you want to manage them separately.
Example:
Select Trades
→ Group Number 1
→ Modify SL/TP
This only modifies trades from Group 1.
Magic Number
A Magic Number is the strategy or EA identifier.
Use a unique Magic Number for every EA or strategy instance running on the same MT5 account.
Example:
EURUSD strategy = 7771
GBPUSD strategy = 7772
XAUUSD strategy = 7773
If two EAs use the same Magic Number, they may treat each other’s trades as their own.
That can cause wrong trade counts, wrong management, or unwanted closes.
How to limit one trade per pair
Goal
Allow only one open EURUSD trade, without blocking trades on other pairs.
Block order
Run per Candle → Trade Rule → Count Trades → Buy Now / Sell Now
Count Trades settings
In the Count Trades block:
Trade type: Buy, Sell, or All Condition: = 0 Advanced Options → Symbol: EURUSD
Use the exact broker symbol.
If your MT5 symbol is EURUSDm, use:
EURUSDm
not:
EURUSD
Screenshot placeholder
[Screenshot placeholder: Count Trades block → Advanced Options expanded → Symbol field highlighted]
Caption:
Use the Symbol field in Count Trades if you only want the EA to count trades on one specific pair, asset, or symbol. The name must exactly match the broker symbol in MT5.
How to limit one trade per strategy
Goal
Allow only one open trade from one specific strategy, even if other EAs are running.
Setup
Give the EA or strategy a unique Magic Number.
Example:
Strategy 1 = 7771
Strategy 2 = 7772
Strategy 3 = 7773
Then make sure the Count Trades logic only checks trades that belong to that strategy.
If you use Group Numbers, assign the execution block to the correct group and filter by that group where needed.
Example
Run per Candle → Trade Rule → Count Trades: Group 1, Symbol EURUSD, trade count = 0 → Buy Now: Group 1
This means:
Only open a new EURUSD Group 1 trade if there is no existing EURUSD Group 1 trade.
How to manage only one pair
If you want to modify, close, trail, or delete orders only for one pair, use Select Trades.
Block order
Run per Tick → Select Trades → Check Profit/Loss → Modify SL/TP
or:
Run per Tick → Select Trades → Close Trades
or:
Run per Tick → Select Trades → Delete Pending Orders
Select Trades settings
In the Select Trades block:
Trade type: Buy, Sell, or All Advanced Options
→ Symbol: EURUSD Optional: Group Number
Again, the symbol must exactly match the broker symbol in MT5.
Screenshot placeholder
[Screenshot placeholder: Select Trades block → Advanced Options expanded → Symbol field highlighted]
Caption:
Use the Symbol field in Select Trades if you only want management logic to affect one specific pair, asset, or symbol. This prevents the EA from modifying or closing trades from other symbols.
Practical example: one trade per pair on EURUSD and GBPUSD
You run two EAs on the same account:
EA 1: EURUSD breakout
EA 2: GBPUSD breakout
Use separate identifiers:
EURUSD EA → Magic Number 7771
GBPUSD EA → Magic Number 7772
In the EURUSD EA:
Count Trades
→ Symbol: EURUSD
→ Count = 0 Buy Now / Sell Now
In the GBPUSD EA:
Count Trades
→ Symbol: GBPUSD
→ Count = 0 Buy Now / Sell Now
Now the EURUSD EA does not block itself because GBPUSD has an open trade.
Practical example: one strategy with two trade groups
You run one EA with two trade types:
Group 1 = main entries
Group 2 = scale-in entries
For main entries:
Trade Rule
→ Count Trades: Group 1, Symbol EURUSD, Count = 0
→ Buy Now: Group 1
For scale-ins:
Trade Rule
→ Count Trades: Group 2, Symbol EURUSD, Count = 0
→ Buy Now: Group 2
For management:
Select Trades: Group 1, Symbol EURUSD
→ Modify SL/TP
This lets you manage main entries and scale-in entries separately.
Best practice setup
Use this structure when running multiple EAs:
What you want | Use |
Separate different EAs | Unique Magic Number |
Separate different logic branches inside one EA | Group Number |
Separate different pairs/assets | Symbol filter |
Prevent duplicate entries | Count Trades |
Modify only selected trades | Select Trades |
Close only selected trades | Select Trades + Close Trades |
Delete only selected pending orders | Select Trades + Delete Pending Orders |
Common mistakes
Mistake 1: Count Trades counts all trades
If you do not set a Symbol or Group filter, Count Trades may count more trades than expected.
Result:
Bot does not open a trade because another pair already has one open.
Fix:
Use the Symbol field and, if needed, Group Number or Magic Number.
Mistake 2: Symbol name does not match broker symbol
Bad:
EURUSD
when the broker symbol is:
EURUSDm
Fix:
Use the exact symbol from MT5 Market Watch.
Mistake 3: Select Trades is missing before management
Do not connect management blocks directly if you only want to manage specific trades.
Bad:
Run per Tick → Modify SL/TP
Better:
Run per Tick → Select Trades → Modify SL/TP
Mistake 4: Same Magic Number across multiple EAs
If multiple EAs use the same Magic Number, they can interfere with each other.
Fix:
Use a unique Magic Number for each EA or strategy instance.
Mistake 5: Count Trades is too far away from execution
Place Count Trades close to Buy Now, Sell Now, or Pending Order blocks.
Better:
Trade Rule → Count Trades → Buy Now
Not:
Count Trades → many other branches → Trade Rule → Buy Now
This keeps the execution check close to the actual trade.
Recommended block order
For new trade entries
Run per Candle / Run in Session
→ Entry Trade Rule → Optional filters
→ Count Trades with Symbol / Group filter
→ Buy Now / Sell Now / Pending Order
For trade management
Run per Tick / Run per Candle → Select Trades with Symbol / Group filter
→ Check Profit/Loss
→ Modify SL/TP / Close Trades / Delete Pending Orders
Conclusion
If your bot should only take one trade per pair, do not let Count Trades check the whole account.
Use:
Symbol filter + unique Magic Number + Group Number if needed
Use Count Trades before opening new trades.
Use Select Trades before managing existing trades.
Always use the exact broker symbol name from MT5, especially when your broker uses suffixes like .pro, .m, or .cash.