I have been developing, testing and correcting this automated scalping system for a long time: https://www.mql5.com/en/signals/author/test-standart. The most stable results have been achieved on currency pairs with Swiss Franc, which means higher profitability and lower drawdown as compared to other symbols.

Highlights to pay attention to

1. During live operation of the EA, the GMT offset parameter is determined automatically based on local time of the computer (GMT_Offset_AUTO=true).

This parameter provides synchronization of the expert settings with the metaTrader 4 server time.

To ensure the correctness of settings it is necessary:

• to compare the GMT time in expert information area on the chart of currency pair, to which the expert is attached, with http://time.is/GMT (or other reliable source).
• If the values do not match, then set GMT_Offset_AUTO=false and set a value of GMT_Offset_Manual according to the instructions in https://www.mql5.com/en/blogs/post/682539

2. In order to activate the News filter function, enable "Allow WebRequest" and add https://sslecal2.forexprostools.com/ to the URL list for WebRequest.

To do this, open Tools > Options > Expert Advisors. Check the option "Allow WebRequests for listed URL:". Add https://sslecal2.forexprostools.com/ and click OK.

The EA contains a news archive (01.01.2015 - 19.05.2019), which is used for testing.

3. By default, in the expert settings, the trading lot size is set to 0.01 for every 50 units of balance.

After testing on real accounts this parameter can be changed depending on your preferences. I recommend using a fixed lot (Use_Fix_Lots) or a recovery money management (Use_MM_Reg_1 or Use_MM_Reg_2).

4. The expert works on any timeframe equally well, as it automatically takes the necessary data from multiple timeframes.

As the expert uses multiple timeframes for the analysis, it is necessary for the quotes of all timeframes (M1, M15, M30, H1, H4) to be downloaded in the terminal for testing. At the same time, the test itself is produced on the M1 timeframe.

5. For brokers with the rule "First In First Out", enable the parameter FIFO_MODE = true.

6. The EA logs information on spread, slippage and other useful information when performing trades, and also when it is possible to make trades.

To write this information, set the parameter Record_Deals = true;

To view this information:

• go to MQL4/Files in the terminal folder and open the corresponding file (this action can be made in time which is not coinciding with time of opening of transactions by the expert and when there is no open transactions of the expert);
• after viewing, close the file (so that the expert could write down information further).

Main Parameters

• ==== GMT and DST ====
• GMT_Offset_Manual - the difference between your broker's server time and GMT.
• GMT_Offset_AUTO - enable/disable the automatic detection of GMT Offset, using the local computer time (does not work in the strategy tester).
• Adjust_DST_Universal - enable/disable Daylight Saving Time correction (for the tester).
• ==== Lot and MM ====
• Use_Fix_Lots - enable/disable fixed trading lot;
• Use_MM - enable/disable the lot value as a percent of deposit based on StopLoss;
• Use_MM_Reg - enable/disable recovery money management (trading lot will not decrease in case of drawdowns);
• ==== Days without Trade ====
• Use_Holidays_Pass - do not trade during the holidays.
• ==== Record of deals in the file ====
• Record_Deals - enable/disable logging of the EA operation details in a file.
• ==== First In - First Out ====
• FIFO_MODE - enable/disable the First In First Out mode.
• ==== News Filter ====
• Use_NewsFilter - use the news filter;
• ==== Strategies select ====
• use_select_Strategy - select strategy from 1 to 6 using optimization in the Strategy Tester.
• ==== TIMING ====
• GMT_Open_Trade_Hour - hour to start opening trades, GMT;
• GMT_Open_Trade_Minute - minute to start opening trades, GMT;
• Period_Open_in_minute - time duration for opening trades in minutes;
• GMT_Monday_OH - time to start opening trades on Monday;
• GMT_Friday_CH - time to stop opening trades on Friday;

The full list of the EA parameters can be found in the blog: https://www.mql5.com/en/blogs/post/695169