There is only KDJ indicator in the spot, but no JDK indicator.

KDJ, also known as the stochastic indicator, was first proposed by Dr. George Lane. It is a fairly new and practical technical analysis indicator. It was first used in the analysis of the futures market. It has been widely used in short- and medium-term trend analysis of the stock market and is the most commonly used technical analysis tool in the futures and stock markets.

The fast line crosses the slow line and hooks upward to form a golden cross, which is bullish on the market. The fast line crosses the slow line and forms a downward hook, which is bearish on the market.