Is there any way for a signal provider to fake or censor trading history.

 
I'm subscribed to a signal, and it appears that there were a coupe of signals that were opened and closed that aren't appearing on their trading history.  It also appears that there are more losses that don't seem to be appearing as well.  I'm just wondering if there is a way they can manipulate the data.
 

Seems you are having the different broker from the signal provider.
And/or you do not have MQL5 VPS to eliminate delays.

.. coupe of signals that were opened and closed that aren't appearing on their trading history ...

It means: your signal provider opened/close some trades but those trades were not open for you?
It is mapping. I am coping the post

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It depends on which error message you have in the log files. If it is something as "no symbol found" so it is not a bug. It is related to the mapping, and it was described many times on the forum and in the FAQ, for example -

Forum on trading, automated trading systems and testing trading strategies

signal activity doesnt work

Sergey Golubev, 2019.09.20 10:43

It is related to symbol mapping:

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The Provider has trading symbol called GOLD, and my broker has the same instrument, but it is called XAUUSD. Are trades on GOLD copied to XAUUSD in that case?

If no symbols remain after conducting all the checks or more than one symbol is found, it is considered that a symbol mapping attempt has failed and it is impossible to copy Provider's trades for that symbol.

Example:

1. "Position USDCAD skipped as no symbol found".
Because the broker is having USDCAD and USDCADc (for example).

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It is strongly recommended to use same broker with the signal provider.

and more -

Forum on trading, automated trading systems and testing trading strategies

Signal Symbols not mapping

Sergey Golubev, 2019.04.17 21:34

...

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The Provider has trading symbol called GOLD, and my broker has the same instrument, but it is called XAUUSD. Are trades on GOLD copied to XAUUSD in that case?

    The Provider has trading symbol called GOLD, and my broker has the same instrument, but it is called XAUUSD. Are trades on GOLD copied to XAUUSD in that case?

    If a Subscriber's account has a symbol with the same name as the one on the Provider's account, and trading is fully allowed for the symbol, trades will be copied for this symbol. If trading is allowed partially or disabled for the found symbol, this symbol is considered inappropriate for copying, and the system will continue to search for a suitable symbol:

    1. On the Subscriber's account, the system searches for all symbols with the names coinciding with the Provider's symbol by the first 6 characters. For example, EURUSD == EURUSDxxx == EURUSDyyy.
    2. Full permission to perform trading is checked for each detected symbol. If trading is allowed partially or completely forbidden, such a symbol is discarded.
    3. Margin calculation type is checked for each remaining symbol - if it is Forex, a symbol is considered to be suitable. Symbols of CFD, Futures or other calculation types are discarded.
    4. If no symbols remain after conducting all the checks or more than one symbol is found, it is considered that a symbol mapping attempt has failed and it is impossible to copy Provider's trades for that symbol.
    5. If one suitable symbol is found, it is used for copying Provider's trades.

    The algorithm provides only two exceptions for metal symbols:

    1. XAUUSD == GOLD
    2. XAGUSD == SILVER

    In these two cases, only full permission to perform trades is checked. If such permission is present, the mapping attempt is considered to be successful.

    Example 1: A Provider has positions on EURUSD, while a Subscriber – on EURUSD! (or vice versa) with full trading permission. The terminal performs mapping automatically and copies the trades.

    Example 2: A Provider has positions on EURUSD, while a Subscriber – both on EURUSD! and EURUSD. The copying is performed for EURUSD.

    Example 3: A Provider has positions on GOLD, while a Subscriber – on XAUUSD with full trading permission. The terminal performs mapping automatically and copies the trades.

    Example 4: A Provider has positions on GOLD, while a Subscriber – on XAUUSD with close-only (partial) trading permission. The mapping is considered unsuccessful and no copying is performed.



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Yowzees:
I'm subscribed to a signal, and it appears that there were a coupe of signals that were opened and closed that aren't appearing on their trading history.  It also appears that there are more losses that don't seem to be appearing as well.  I'm just wondering if there is a way they can manipulate the data.

Trades that open and close instantly may not appear in their history.

There is always a way to manipulate trading data and this has happened in the past, that's why some brokers are banned from MQL5.com.

Reason: