Adjustable MACD with 4-Color Histogram

The Adjustable MACD with 4-Color Histogram is an enhanced MACD indicator that allows full customization of MACD parameters and uses four distinct colors in the histogram to clearly visualize:
- MACD above Signal & rising (bullish momentum increasing).
- MACD above Signal & falling (bullish but weakening).
- MACD below Signal & falling (bearish momentum increasing).
- MACD below Signal & rising (bearish but weakening).
This color-coded system makes it easier to quickly assess trend direction, momentum strength, and potential reversal zones at a glance.