== show_gaps == The ''show_gaps'' parameter specifies the mode to indicate the missing or invalid data. The following modes are supported: * ''NONE'' - the indication of missing data is turned off * ''EMPTY'' - The timestamps of real data records will be indicated if there is missing or invalid data available within time interval on display. * ''POINTS'' - The timestamps of real data records will be indicated at the graph. * ''GAPS'' - The parts of graph with problematic data is indicated with red lines.