Spark fires on the falling edge of of the coil output, the time that wave is high is the dwell time. Also, the missing tooth is offset by about 60 degrees from TDC.
'88 245 - 2JZGTE VVTi | MS3X ECU, MS2 TCU | GT3582R-HTA | Staged simultaneous dual fuel | 590whp 580ftlbs @ 22psi
1968 Furd Rustang fastberk | 2JZGTE VVTi | MS3X ECU | PT6776S @ 18 psi | Close ratio T10 trans | 3.31 8.8" rear end
1981 Piper Cherokee Archer II | All stock