The KDJ indicator (also known as the Stochastics Oscillator) is available on MT4/MT5 platforms as a two-line indicator. To add it, follow these steps:

1. On the platform menu, click “Insert” → “Indicators” → “Oscillators” → “Stochastics Oscillator”.
2. In the pop-up window, set your desired parameters (such as %K, %D, slowing period, and applied price).
3. Click “OK” to apply the KDJ indicator to your chart.

The KDJ indicator is used to analyze market trends, momentum, and potential overbought/oversold conditions.