EA to Close Trades Using Exchange File

I need an EA that compares the candle close price of 2 MT4 terminals, and closes trades according to a formula. I already have a seperate arbitrage EA to open and close the trades. This EA that you are doing will add an additional method to close the trade, in case the original EA fails to close it. Reliability and stability of this EA is the priority.

On the same computer, I will use 2 MT4 terminals - Primary MT4 and Secondary MT4. There will also be 2 EAs - Primary EA and Secondary EA. The Primary EA will be installed in Primary MT4 M1 chart. Secondary EA will be installed in Secondary MT4 M1 chart. There will be one Secondary EA, and one Primary EA.

The Secondary EA will send candle close prices (bid price) of all the symbols in the market watch to an exchange file. This exchange file is to be located in C:\Users\Username\AppData\Roaming\MetaQuotes\Terminal\Common\Files. The secondary will send the candle close prices of the previous minute and the previous previous minute, as well as the corresponding time of the candle. For example, if the broker time is 10:03:23, secondary EA will send the close prices of the 10:02 and 10:01 candles, and their candle times. For each symbol in the secondary market watch, the exchange file will contain 4 data: 10:01 candle close price, 10:01 candle time, 10:02 candle close price, 10:02 candle time. Secondary EA will update the exchange file every second. So whenever a new candle is formed, the exchange file will get updated. The exchange file will contain data for all the symbols in the market watch.

This is an example of what the exchange file should look like. You can use a different format, as long as all the required data is included.

AUDCAD 10:01 0.91978

AUDCAD 10:02 0.91944

AUDJPY 10:01 80.381

AUDJPY 10:02 80.393

GBPAUD 10:01 1.87760

GBPAUD 10:02 1.87743

etc

The Primary EA will read the exchange file every second. First, it will look at the same symbol. Then, it will look at the secondary MT4 candle times, and compare that candle to the same candle in the primary MT4. For example, for each symbol, the primary EA will look at the 10:01 and 10:02 candle in the primary MT4, and compare it to the same candle in the exchange file.

The Primary EA will close trades according to the following formula:

Close trade condition:

(ClosePrimary - CloseSecondary) of previous minute = (ClosePrimary - CloseSecondary) of previous previous minute

ClosePrimary- Candle closing price of primary MT4

CloseSecondary- Candle closing price of secondary MT4

The Primary EA will do this calculation every second to check the close trade condition. This calculation is done for all the symbols. For any particular symbol, if the close trade conditions are met, all trades of that symbol will close.

Please show the calculation in the Experts log when Primary EA closes a trade. This is so that I can check if calculation is correct. 

Sometimes, the broker will have missing candles. If any of the 4 candles are missing, calculation cannot be done and EA does not close trade. EA will wait until all 4 candle data are present before doing a calculation.

Note 1: Primary MT4 and Secondary MT4 are using same broker and have the same broker time.

Note 2: The suffix of the Primary and Secondary MT4 are different. Maybe I need to input the suffix in the EA settings.