Get Macd indicator how to use Code That Actually Works

//@version=5
indicator(title="MACD Indicator - Pro Usage", shorttitle="MACD Pro", overlay=false)

// Input parameters for customization
fast_len = input.int(12, minval=1, title="Fast Length")
slow_len = input.int(26, minval=1, title="Slow Length")
signal_len = input.int(9, minval=1, title="Signal Length")
src = input.source(close, title="Source")

// Additional inputs for signals and visuals
show_signals = input.bool(true, title="Show Crossover Signals")
show_histogram = input.bool(true, title="Show Histogram")

// Core MACD calculations
fast_ema = ta.ema(src, fast_len)
slow_ema = ta.ema(src, slow_len)
macd_line = fast_ema - slow_ema
signal_line = ta.ema(macd_line, signal_len)
histogram = macd_line - signal_line

// Plot MACD line and signal
plot(macd_line, color=color.new(color.blue, 0), title="MACD Line", linewidth=2)
plot(signal_line, color=color.new(color.orange, 0), title="Signal Line", linewidth=2)

// Zero line
hline(0, "Zero Line", color=color.new(color.gray, 50), linestyle=hline.style_dashed)

// Histogram plot
hist_color = histogram >= 0 ? color.new(color.green, 20) : color.new(color.red, 20)
plot(show_histogram ? histogram : na, color=hist_color, style=plot.style_columns, title="Histogram", linewidth=3)

// Crossover signals
bull_cross = ta.crossover(macd_line, signal_line)
bear_cross = ta.crossunder(macd_line, signal_line)

// Plot shapes for signals
plotshape(show_signals and bull_cross, title="Bullish Cross", location=location.bottom, color=color.new(color.green, 0), style=shape.labelup, text="BUY", textcolor=color.white, size=size.small)
plotshape(show_signals and bear_cross, title="Bearish Cross", location=location.top, color=color.new(color.red, 0), style=shape.labeldown, text="SELL", textcolor=color.white, size=size.small)

// Simple divergence detection (bullish/bearish)
lookback = input.int(5, minval=2, maxval=20, title="Divergence Lookback")

pl = ta.pivotlow(low, lookback, lookback)
macd_pl = ta.pivotlow(macd_line, lookback, lookback)

ph = ta.pivothigh(high, lookback, lookback)
macd_ph = ta.pivothigh(macd_line, lookback, lookback)

// Bullish divergence: price lower low, MACD higher low
bull_div = not na(pl) and not na(macd_pl[lookback]) and low[lookback] < low[lookback*2] and macd_line[lookback] > macd_line[lookback*2]

// Bearish divergence: price higher high, MACD lower high
bear_div = not na(ph) and not na(macd_ph[lookback]) and high[lookback] > high[lookback*2] and macd_line[lookback] < macd_line[lookback*2]

plotshape(bull_div, title="Bullish Divergence", location=location.bottom, color=color.new(color.lime, 0), style=shape.diamond, size=size.normal)
plotshape(bear_div, title="Bearish Divergence", location=location.top, color=color.new(color.maroon, 0), style=shape.diamond, size=size.normal)

// Alert conditions
alertcondition(bull_cross, title="MACD Bullish Crossover", message="MACD Bull Cross: Potential BUY signal")
alertcondition(bear_cross, title="MACD Bearish Crossunder", message="MACD Bear Cross: Potential SELL signal")
alertcondition(bull_div, title="Bullish Divergence", message="MACD Bullish Divergence Detected")
alertcondition(bear_div, title="Bearish Divergence", message="MACD Bearish Divergence Detected")

// Background color for trend
bgcolor(macd_line > signal_line ? color.new(color.green, 95) : color.new(color.red, 95))