Donnelly says she uses a formula to determine with certainty where to set a stop or sell a stock. The starting block is determining how much profit an investor wants to retain given a time period ...

If the stock hovers at $44 per share, the trader will realize a profit but also have to sell 100 shares at the $45 strike price. Any number below $43.50 represents a loss. Walk into Every Trade ...

When we plug both numbers in our formula, we get a net profit of 15% ($3 billion /$20 billion x 100). That means, for every dollar that Company X generates in sales, it earns $0.15 in revenue ...