thinkorswim by TD Ameritrade recently decided to drop ProphetCharts from its trading platform.

Since its introduction in 2004, Tim Knight’s ProphetCharts has become the de facto charting solution for millions of active traders both independently and after TD Ameritrade’s acquisition. The real testament to its greatness is the fact that there have been no real improvements over the past decade, but it was still the go-to solution for any trader that was serious about technical analysis.

Many book recommendations for traders focus on timeless classics, such as A Random Walk Down Wall Street or Reminiscences of a Stock Operator. While these are timeless classics that are certainly worth reading, traders may want to turn toward more technical books to gain the insights they need to profit during their day-to-day activities.

Let’s take a look at five books that can help traders of any skill level improve their skillsets.