A Winning System in Good Times Or Bad
| Author(s) | William J. O'Neil |
| Year | 2009 |
| Pages Count | 290 pages |
| ISBN-10 | 0070480176 |
| ISBN-13 | 9780070480179 |
| Rating | ★★★★☆ 4.30 / 5 (577 reviews) |
The previous edition of the bestselling classic has sold more than 400,000 copies. Now, market guru and Investor's Business Daily publisher O'Neil offers a thoroughly updated version of this virtual rule book for becoming an investment pro.