This TOS indicator shows the breakeven prices of a butterfly options strategy on the price chart. It also displays the maximum profit and maximum loss of the strategy, and the prices at which these occur. 
 
The indicator automatically chooses the strike prices based on the underlying stock price, and you are able to shift the strike prices upwards or downwards to create a bullish or bearish bias. You can also choose the expiration date, whether to use calls or puts to create the butterfly, whether to analyze a long or short position, and the number of contracts used to calculate the max profit and max loss.