Pin Bar Inside Bar Script

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-- SPDX-License-Identifier: MIT
-- IQOptionWiki QCS Library
-- IQOW Pin Bar Inside Bar v1.0.0
--
-- Pin bar and inside bar combo. A pin bar (long wick, small body) shows price
-- rejection. The next candle is an inside bar: its whole range sits within the
-- pin bar's range, a pause before the move. The setup completes when a candle
-- closes beyond the pin bar's far side, in the direction of the pin.
-- Pin geometry (inputs): wick at least 2x the body and at least 50% of the range.
--
-- HIGHER: bullish pin bar (long lower wick), then an inside bar, then within
--         the breakout window a candle closes above the pin bar's high.
-- LOWER:  bearish pin bar (long upper wick), then an inside bar, then within
--         the breakout window a candle closes below the pin bar's low.
--
-- 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 Pin Bar Inside Bar",
    short_name = "IQOW PIN IB",
    overlay = true
}

input_group {
    "1. Pin bar geometry",
    wick_to_body = input (2, "Wick at least X times the body", input.double, 1, 10, 0.5, false),
    wick_share = input (0.5, "Wick at least this share of the range", input.double, 0.4, 0.95, 0.05, false)
}

input_group {
    "2. Combo timing",
    breakout_window = input (4, "Breakout window after the inside bar (candles)", input.integer, 1, 6)
}

input_group {
    "Display and advice",
    pins_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",
    bullish_pin_color = input { default = "#25E154", type = input.color },
    bearish_pin_color = input { default = "#FF6C58", type = input.color },
    pin_width = input { default = 3, 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 }
}

-- Candle geometry. A pin bar has a long wick on one side and a small body.
local open_now = get_value (open, nil)
local high_now = get_value (high, nil)
local low_now = get_value (low, nil)
local close_now = get_value (close, nil)

local data_is_ready = open_now ~= nil and high_now ~= nil and low_now ~= nil and close_now ~= nil

local candle_range = 0
local body_size = 0
local lower_wick = 0
local upper_wick = 0
if data_is_ready then
    candle_range = high_now - low_now
    body_size = math.abs (close_now - open_now)
    lower_wick = math.min (open_now, close_now) - low_now
    upper_wick = high_now - math.max (open_now, close_now)
end
local has_range = candle_range > 1e-10

bullish_pin = conditional (
    data_is_ready and has_range and
    lower_wick >= wick_to_body * body_size and
    lower_wick >= wick_share * candle_range
)

bearish_pin = conditional (
    data_is_ready and has_range and
    upper_wick >= wick_to_body * body_size and
    upper_wick >= wick_share * candle_range
)

-- Look back for a pin bar followed by an inside bar. The pin bar sits "back"
-- candles ago, the inside bar right after it. No candle since the pin bar may
-- have closed beyond its far side already, so only the first breakout counts.
local bullish_combo = false
local bearish_combo = false

if data_is_ready then
    for back = 2, breakout_window + 1 do
        local pin_high = get_value (high [back], nil)
        local pin_low = get_value (low [back], nil)
        local inside_high = get_value (high [back - 1], nil)
        local inside_low = get_value (low [back - 1], nil)

        if pin_high ~= nil and pin_low ~= nil and inside_high ~= nil and inside_low ~= nil and
            inside_high <= pin_high and inside_low >= pin_low then
            local broke_up_before = false
            local broke_down_before = false
            for later = 1, back - 1 do
                local later_close = get_value (close [later], nil)
                if later_close == nil or later_close > pin_high then
                    broke_up_before = true
                end
                if later_close == nil or later_close < pin_low then
                    broke_down_before = true
                end
            end

            if get_value (bullish_pin [back], false) and not broke_up_before and close_now > pin_high then
                bullish_combo = true
            end
            if get_value (bearish_pin [back], false) and not broke_down_before and close_now < pin_low then
                bearish_combo = true
            end
        end
    end
end

higher_setup = conditional (bullish_combo)
lower_setup = conditional (bearish_combo)

-- 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)
)

-- Dots on the pin bars themselves (pin high for bullish, pin low for bearish),
-- so the chart shows which candle started the combo.
if pins_visible then
    plot (iff (bullish_pin, high, nil), "Bullish pin high", bullish_pin_color, pin_width, 0, style.points)
    plot (iff (bearish_pin, low, nil), "Bearish pin low", bearish_pin_color, pin_width, 0, style.points)
end

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

    plot_shape (
        confirmed_lower,
        "PIN IB 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