Go to 'How Profitable' website and in the 'all bonds adjust' window  look at the DROI % column. For the upcoming week anything above 2% is profitable (after allowing for commision), assuming you plan to cash out after adjust. Of course it might be that you want to continue to hold your position if the Starbond's subsequent adjust will be in the same direction. To check this click on the bond's ticker symbol in the first column to get another window of all that bond's subsequent adjusts. When you have finished the first week click on the next week and repeat. Obviously the DROI will be profitable at a lower percentage as you will have a whole extra week to accrue profits on your investment. To evaluate the profitability in money terms simply place your cursor over the percentage figure in the DROI column and it will show the required investment and the profit (both before deducting commision). It's simply a case of evaluating at what point the commision outweighs the profit. Rinse and repeat as far forward as you like.