MetaQuotes has released a new version (Build 3210) of the MetaTrader 5 platform and it is now available for automatic update in your broker platform. It introduces some new and fixes some bugs:

MetaQuotes' forum announcement thread:
https://www.mql5.com/en/forum/388634
If you find a bug or some undocumented feature in the new build, please post about it here.
- Added new class methods to work with matrices and vectors in MQL5 language.
- Fixed formatting of floating point numbers in input parameters.
- Fixed errors in the standard Math.mqh library.
- Fixed an error in CopyTicks() and CopyTicksRange() functions that could yield outdated tick data.
- Added INDICATOR_FIXED_MINIMUM and INDICATOR_FIXED_MAXIMUM values to the ENUM_CUSTOMIND_PROPERTY_INTEGER enumeration to dynamically control custom indicator min and max levels via the IndicatorSetInteger() function.
- Changed how Sharpe ratio is calculated in the Strategy Tester to use a 1-year period in the formula.
- Optimized consumption of computer memory by the trading terminal.
- Removed zero level from a separate indicator window when grid is turned off.

MetaQuotes' forum announcement thread:
https://www.mql5.com/en/forum/388634
If you find a bug or some undocumented feature in the new build, please post about it here.