New hob-file format 1.2 is added. In this format, 3 values of current session volumes are saved along with every book: SYMBOL_SESSION_INTEREST, SYMBOL_SESSION_BUY_ORDERS_VOLUME, SYMBOL_SESSION_SELL_ORDERS_VOLUME.

To enable new format set SaveSessionInfo input parameter to true. By default, SaveSessionInfo is false, and hob-files are saved in previous format 1.1. If a hob-file of version 1.1 does already exist for current day, it will not be switched to format 1.2 automatically. If required, you may export the hob-file to CSV format by means of OrderBook Utilities and then import the CSV back to a hob with SaveSessionInfo=true.

To upgrade to 1.2 it's recommended to switch SaveSessionInfo on between the days, when a hob-file for new day is not yet created.

It's not necessary to convert all historical hob-files to format 1.2, both formats are supported in parallel.

Starting from build 1930 MetaQuotes broke MQL5 back compatibility with MqlBookInfo structure by adding new field volume_real into it.

This version of the product supports new structure format, but it will not work on older builds.