$ Pinescript MACD (Moving Average Convergence Divergence)

//@version=5
indicator("My MACD Indicator", overlay=false)

// Inputs for MACD parameters
fastLength = input(12, title="Fast Length")
slowLength = input(26, title="Slow Length")
signalLength = input(9, title="Signal Length")

// Calculate MACD components using the built-in function
[macdLine, signalLine, hist] = ta.macd(close, fastLength, slowLength, signalLength)

// Plot the MACD Line
plot(macdLine, title="MACD Line", color=color.blue, linewidth=2)

// Plot the Signal Line
plot(signalLine, title="Signal Line", color=color.orange, linewidth=1)

// Plot the Histogram
// Color the histogram based on its value (positive/negative and increasing/decreasing)
histColor = hist >= 0 ? (hist[1] <= hist ? color.new(color.teal, 20) : color.new(color.lime, 20)) :
            (hist[1] >= hist ? color.new(color.red, 20) : color.new(color.maroon, 20))
plot(hist, title="Histogram", style=plot.style_columns, color=histColor)

// Plot a horizontal line at zero for reference
hline(0, "Zero Line", color.gray)

//@version=5
strategy("MACD Crossover Strategy", overlay=true)

fastLength = input(12, "Fast Length")
slowLength = input(26, "Slow Length")
signalLength = input(9, "Signal Length")

[macdLine, signalLine, hist] = ta.macd(close, fastLength, slowLength, signalLength)

// Define conditions for long and short entries
longCondition = ta.crossover(macdLine, signalLine)
shortCondition = ta.crossunder(macdLine, signalLine)

// Execute strategy entries
if (longCondition)
    strategy.entry("Buy", strategy.long)

if (shortCondition)
    strategy.entry("Sell", strategy.short)

// Optional: Plot the MACD and Signal lines in a separate pane for visualization
// plot(macdLine, "MACD", color.blue)
// plot(signalLine, "Signal", color.orange)
// plot(hist, "Histogram", style=plot.style_columns, color=hist >= 0 ? color.teal : color.red)
// hline(0, "Zero Line", color.gray)

//@version=5
indicator("MACD Divergence Scanner", overlay=true)

fastLength = input(12, "Fast Length")
slowLength = input(26, "Slow Length")
signalLength = input(9, "Signal Length")

[macdLine, signalLine, hist] = ta.macd(close, fastLength, slowLength, signalLength)

// Plot MACD and Signal lines for visual confirmation
plot(macdLine, "MACD", color.blue)
plot(signalLine, "Signal", color.orange)
hline(0, "Zero Line", color.gray)

// Simple divergence detection logic (conceptual, for advanced scripts this would be more complex)
// This is a basic example and might need refinement for actual trading.

// Bullish Divergence (MACD Line makes higher low, Price makes lower low)
bullishDivergence = false
if macdLine[2] < macdLine[1] and macdLine[1] > macdLine and close[2] > close[1] and close[1] < close
    // Add logic to check for clear pivots and significant divergence
    // For simplicity, we'll just check for a basic pattern
    bullishDivergence := true

// Bearish Divergence (MACD Line makes lower high, Price makes higher high)
bearishDivergence = false
if macdLine[2] > macdLine[1] and macdLine[1] < macdLine and close[2] < close[1] and close[1] > close
    // Similar to bullish divergence, more robust checks needed for production
    bearishDivergence := true

// Plot divergence signals on the price chart
plotshape(bullishDivergence, title="Bullish Divergence", location=location.belowbar, color=color.green, style=shape.triangleup, size=size.small)
plotshape(bearishDivergence, title="Bearish Divergence", location=location.abovebar, color=color.red, style=shape.triangledown, size=size.small)

// Alert for divergence
alertcondition(bullishDivergence, "Bullish Divergence Detected!", "Potential bullish reversal based on MACD divergence.")
alertcondition(bearishDivergence, "Bearish Divergence Detected!", "Potential bearish reversal based on MACD divergence.")