“The Disciplined Trader: Developing Winning Attitudes” by Mark Douglas is a paperback book published in 1990 by Penguin Publishing Group. It delves into the psychology of trading and investing, focusing on the importance of developing a disciplined approach to the markets. The book covers topics such as finance, investments, and applied psychology, making it a valuable resource for those looking to improve their trading skills and mindset. With its insightful insights and practical advice, this book is a must-read for anyone serious about becoming a successful trader.”