Greetings,

This question has been asked by email enough times to make this post and outline the solution.

When mGlider downloads price data it tries to get more data than requested so that overlays and indicators are displayed without gaps. By default mGlider fetches 50 more bars. In case you use big numbers for your studies like SMA(200) or EMA(200) you are going to get visual gaps on a screen because not enough price data are pre-fetched:

To increase number of bar mGlider is pre-fetching go to "Tools/Program Options/Data Collection":

After you set a new value don't forget to update historical data for you graph:

Thank you.