You can do this via scripting, a quick template example:

var traceobj = selection[0].trace();
var opt = traceobj.tracing.tracingOptions;

opt.cornerAngle = 90;
opt.fills = true;
opt.ignoreWhite = false;
opt.maxColors = 32;
opt.maxStrokeWeight = 0;
opt.minArea = 5;
opt.minStrokeLength = 3;
opt.outputToSwatches = true;
opt.palette = '';
opt.pathFitting = true;
opt.preprocessBlur = 0;
opt.strokes = false;
// threshold = 120 // BW only
opt.tracingMode = TracingModeType.TRACINGMODECOLOR

traceobj.tracing = opt;

You can do this via scripting, a quick template example:

var traceobj = selection[0].trace();
var opt = traceobj.tracing.tracingOptions;

opt.cornerAngle = 90;
opt.fills = true;
opt.ignoreWhite = false;
opt.maxColors = 32;
opt.maxStrokeWeight = 0;
opt.minArea = 5;
opt.minStrokeLength = 3;
opt.outputToSwatches = true;
opt.palette = '';
opt.pathFitting = true;
opt.preprocessBlur = 0;
opt.strokes = false;
// threshold = 120 // BW only
opt.tracingMode = TracingModeType.TRACINGMODECOLOR

traceobj.tracing.tracingOptions = opt;