In a sense. You can limit the chart to a Top N. See the Limitation option of the dimension in the properties pane of the line chart.
Or you can use variables to select an interval of dates in a set analysis expression so the chart only shows the results for that interval. Or use this extension: GitHub - NOD507/SenseDateRangePicker: A date range picker extension for qliksense
We have target 'time aware charts' for Qlik Sense 3.0 (to be released in June). This enhancement will understand that you are displaying a time series and compress into the space (along with appropriate labelling).
In the meantime you may want to use this extension: http://branch.qlik.com/#!/project/56728f52d1e497241ae6987f
PS: I'm legally required state that my future looking statements may change so they can not be depended upon when making decisions.