Fixations from tobii eye tracker data

Hello everyone, I hope all is well. I am using Tobiix120 eye tracker with psychtoolbox for presenting my stimuli to the participant. My question is How can I get the fixations metrics of the participants eye movements during the stimuli presentation, is there any toolbox or packages that can help me. I did try the get gaze data method in tobii sdk (avalible here: http://developer.tobiipro.com/matlab/matlab-sdk-reference-guide.html) but it doesnt provide metrics as what I need