Tag historian only going back so far on easy chart

i am trying to make an easy chart that i am using go back a full year. when i type 365 days into the window it is only giving me about 84 days and i have no idea why… the system is storing all of the data. how am i able to get it to show up properly?

thank you

One of the properties of the easy chart is a maximum selection range. I would start by making sure that is set to one year or greater.