Preheat Outdoor Grill For Medium Heat. Marinate Swordfish In Teriyaki Sauce For 5 Minutes Per Side. Lightly Oil Grill Grate. Grill Steaks, Basting Frequently With Melted Margarine, For 5 To 6 Minutes Per Side, Or Until Fish Flakes Easily With A Fork. Season With Garlic Powder, And Serve.