The Hilbert Oscillator Indicator was created John Ehlers in “Rocket Science For Traders”, pg.90-91.
This indicator works very well for identifying major turning points. When the blue line crosses the red line, the stock starts an uptrend, and the opposite is true. The MetaTrader 5 version also includes immediate buy and sell signals through line 0, so buy when the line is green and sell when it is red.
The version for MetaTrader 4 will not be presented here. You can download it along with the source code through my Telegram channel. The link to the channel is in my