Updates in client terminal MetaTrader4. Build 172.

MetaTrader4. Build 172.

What’s new:
1. Updated CurTime() function;
2. Updated expert initialization function;
3. Enabled importing from other symbols (in HST format);
4. In MQL4 added StringConcatenate() function;
5. Updated Dictionary of MetaEditor IDE;
6. Updating based on crash-logs.