One of the weak points in the Bitshares light app is the charts. But they can get better. This trick is best suited for larger monitors and high resolution. If you use a laptop, you might be best off with the standard setting.
Note the purple circle:
Press the settings icon:
Replace the nuber with a higher one. I go for 700 pix:
Enjoy a more useable graph:
This is one of many small tricks that makes it more enjoyable to use the software.
