Auto Fib

// This indicator code was generated using AI. It was not checked by Quality Assurance
// and did not pass any quality assurance processes that we normally would use at TrendSpider
// As a result, we can’t guarantee that it will operate as expected in all cases and you should
// use caution when using this indicator. Consider it for informational purposes only.
describe_indicator('Auto Fib', 'price', { shortName: 'Fib+' });

// Input for lookback and offset periods
const lookbackPeriod = 50; // Lookback over 50 periods for medium-term range
const offsetPeriod = 25;   // Offset 25 periods back for predictive relevance
const projectionBars = 50;  // Project 50 bars into the future (TrendSpider max)

// Fibonacci levels with updated colors and thickness
const fibLevels = [
    { level: -1.0, color: '#4A00E0', name: '-100%', thickness: 1 },     // Deep blue
    { level: -0.786, color: '#7B68EE', name: '-78.6%', thickness: 1 },  // Medium slate blue
    { level: -0.618, color: '#9370DB', name: '-61.8%', thickness: 1 },  // Medium purple
    { level: -0.5, color: '#BA55D3', name: '-50%', thickness: 1 },      // Medium orchid
    { level: -0.382, color: '#DA70D6', name: '-38.2%', thickness: 1 },  // Orchid
    { level: -0.236, color: '#EE82EE', name: '-23.6%', thickness: 1 },  // Violet
    { level: 0.0, color: 'white', name: '0%', thickness: 3 },         // Black (thicker)
    { level: 0.236, color: '#FFD700', name: '23.6%', thickness: 1 },    // Gold
    { level: 0.382, color: '#FFA500', name: '38.2%', thickness: 1 },    // Orange
    { level: 0.5, color: '#FF8C00', name: '50%', thickness: 1 },        // Dark orange
    { level: 0.618, color: '#FF4500', name: '61.8%', thickness: 1 },    // Orange red
    { level: 0.786, color: '#FF6347', name: '78.6%', thickness: 1 },    // Tomato
    { level: 1.0, color: 'white', name: '100%', thickness: 3 },       // Gray (thicker)
    { level: 1.382, color: '#FF69B4', name: '138.2%', thickness: 1 },   // Hot pink
    { level: 1.618, color: '#FF1493', name: '161.8%', thickness: 1 },   // Deep pink
    { level: 2.0, color: '#DC143C', name: '200%', thickness: 1 },       // Crimson
    { level: 2.618, color: '#B22222', name: '261.8%', thickness: 1 },   // Firebrick
    { level: 4.236, color: '#8B0000', name: '423.6%', thickness: 1 }    // Dark red
];

// Define the range to analyze
const startIndex = time.length - offsetPeriod - lookbackPeriod; // Starting 75 periods back
const endIndex = time.length - offsetPeriod;                   // Up to 25 periods back

// Ensure the range is valid
assert(startIndex >= 0, "Not enough data to calculate Fibonacci levels.");

// Find the highest high and lowest low over the range
const highRange = high.slice(startIndex, endIndex);
const lowRange = low.slice(startIndex, endIndex);
const highestHigh = Math.max(...highRange);
const lowestLow = Math.min(...lowRange);

// Calculate the range
const range = highestHigh - lowestLow;

// Paint Fibonacci levels and project them into the future
fibLevels.forEach(({ level, color, name, thickness }) => {
    const fibValue = lowestLow + range * level;
    // Land the levels on the chart up to the current time
    const series = land_points_onto_series(
        [time[startIndex], time[time.length - 1]],
        [fibValue, fibValue],
        time
    );
    const fibSeries = interpolate_sparse_series(series, 'constant');
    // Paint the levels
    const lineRef = paint(fibSeries, {
        name: `${name}`,
        color: color,
        thickness: thickness,
        style: 'ladder',
        ignoreWhenScaling: true
    });
    // Project the levels into the future
    const projectionValues = Array(projectionBars).fill(fibValue);
    paint_projection(lineRef, projectionValues);
});