Fractal Chaos Bands Break Script

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-- SPDX-License-Identifier: MIT
-- IQOptionWiki QCS Library
-- IQOW Fractal Chaos Bands Break v1.0.0
--
-- Fractal Chaos Bands draw the level of the last confirmed Williams fractal
-- high (upper band) and fractal low (lower band). A fractal is five candles
-- with the extreme in the middle and is confirmed two candles later. The
-- bands are flat in ranges and step in the trend direction.
--
-- HIGHER: the candle closes above the upper band after the previous close was
--         at or below it.
-- LOWER:  the candle closes below the lower band after the previous close was
--         at or above it.
--
-- Markers use the previous completed candle: they appear after the next candle
-- opens and are shifted back one bar onto the candle that qualified.
-- Educational chart tool only. It does not place trades, choose an expiry,
-- predict outcomes, or guarantee results. Test on a Practice balance first.

instrument {
    name = "IQOW Fractal Chaos Bands Break",
    short_name = "IQOW FCB",
    overlay = true
}

input_group {
    "Display and advice",
    bands_visible = input { default = true, type = input.plot_visibility },
    signals_visible = input { default = true, type = input.plot_visibility },
    advice_enabled = input { default = false, name = "Enable platform advice", type = input.boolean }
}

input_group {
    "Colors",
    upper_color = input { default = "#25E154", type = input.color },
    lower_color_line = input { default = "#FF6C58", type = input.color },
    band_fill_color = input { default = rgba(87, 161, 208, 0.12), type = input.color },
    line_width = input { default = 1, type = input.line_width },
    higher_color = input { default = "#25E154", type = input.color },
    lower_color = input { default = "#FF6C58", type = input.color },
    signal_text_color = input { default = "#FFFFFF", type = input.color }
}

-- Williams fractal: the middle candle of five has the highest high (or lowest
-- low). It is only confirmed two candles later, so the pivot is read at [2]
-- and the level is remembered until the next fractal appears. No future bars.
local pivot_high = get_value (high [2], nil)
local pivot_low = get_value (low [2], nil)

local is_up_fractal =
    pivot_high ~= nil and get_value (high [4], nil) ~= nil and
    get_value (high, 0) <= pivot_high and get_value (high [1], 0) <= pivot_high and
    get_value (high [3], 0) <= pivot_high and get_value (high [4], 0) <= pivot_high

local is_down_fractal =
    pivot_low ~= nil and get_value (low [4], nil) ~= nil and
    get_value (low, 0) >= pivot_low and get_value (low [1], 0) >= pivot_low and
    get_value (low [3], 0) >= pivot_low and get_value (low [4], 0) >= pivot_low

up_fractal_level = iff (is_up_fractal, high [2], up_fractal_level [1])
down_fractal_level = iff (is_down_fractal, low [2], down_fractal_level [1])

local upper_now = get_value (up_fractal_level, nil)
local lower_now = get_value (down_fractal_level, nil)
local close_now = get_value (close, nil)
local close_previous = get_value (close [1], nil)

local data_is_ready =
    upper_now ~= nil and lower_now ~= nil and
    close_now ~= nil and close_previous ~= nil

-- Break: close crosses the band on this candle.
higher_setup = conditional (
    data_is_ready and close_now > upper_now and close_previous <= upper_now
)

lower_setup = conditional (
    data_is_ready and close_now < lower_now and close_previous >= lower_now
)

-- Confirm only a new setup on the previous completed candle.
confirmed_higher = conditional (
    get_value (higher_setup [1], false) and
    not get_value (higher_setup [2], false)
)

confirmed_lower = conditional (
    get_value (lower_setup [1], false) and
    not get_value (lower_setup [2], false)
)

if bands_visible then
    fill (down_fractal_level, up_fractal_level, "Fractal Chaos area", band_fill_color)
    plot (up_fractal_level, "Upper band", upper_color, line_width)
    plot (down_fractal_level, "Lower band", lower_color_line, line_width)
end

if signals_visible then
    plot_shape (
        confirmed_higher,
        "FCB HIGHER",
        shape_style.triangleup,
        shape_size.small,
        higher_color,
        shape_location.belowbar,
        -1,
        "HIGHER",
        signal_text_color
    )

    plot_shape (
        confirmed_lower,
        "FCB LOWER",
        shape_style.triangledown,
        shape_size.small,
        lower_color,
        shape_location.abovebar,
        -1,
        "LOWER",
        signal_text_color
    )
end

-- QCS advice is a platform notification state only; it does not place trades.
if advice_enabled and
    get_value (confirmed_higher, false) and
    not get_value (confirmed_lower, false) then
    advise (advice.buy)
elseif advice_enabled and
    get_value (confirmed_lower, false) and
    not get_value (confirmed_higher, false) then
    advise (advice.sell)
else
    advise (advice.neutral)
end