VP Sparse Visual Fixture

// This source code is subject to the terms of the Mozilla Public License 2.0
// at https://mozilla.org/MPL/2.0/
// © 2026 TheStratSuite contributors
//@version=6

// Visual-design fixture only.
// This script does not calculate a Volume Profile, select a candidate, or make
// a trading claim. It renders one manually supplied, already-validated Value
// Area edge so the one-zone information budget can be assessed independently.
indicator(
     "VP Sparse Visual Fixture v0.0.1",
     shorttitle = "VP Sparse EXP Fixture",
     overlay = true,
     max_labels_count = 1)

string contractGroup = "Validated fixture (manual research input)"
bool enabledInput = input.bool(
     false,
     "Show experimental fixture",
     group = contractGroup,
     tooltip = "Off by default. Enable only for the symbol and frozen profile named below.")
string symbolInput = input.string(
     "ESU2026",
     "Exact ticker",
     group = contractGroup)
string selectedEdgeInput = input.string(
     "VAH",
     "Selected edge",
     options = ["VAH", "VAL"],
     group = contractGroup)
float vahInput = input.float(
     7455.00,
     "Validated VAH",
     step = 0.25,
     group = contractGroup)
float valInput = input.float(
     7425.00,
     "Validated VAL",
     step = 0.25,
     group = contractGroup)
int effectiveStartInput = input.time(
     timestamp("24 Jul 2026 13:30 +0000"),
     "Preview start",
     group = contractGroup)
int effectiveEndInput = input.time(
     timestamp("24 Jul 2026 20:15 +0000"),
     "Preview end",
     group = contractGroup)

string geometryGroup = "Locked geometry"
int outputBinTicksInput = input.int(
     4,
     "Output-bin ticks",
     options = [4],
     group = geometryGroup)

bool validContract = enabledInput and
     syminfo.ticker == symbolInput and
     timeframe.isintraday and
     effectiveStartInput < effectiveEndInput and
     vahInput > valInput and
     valInput > 0.0

float edgePrice = selectedEdgeInput == "VAH" ? vahInput : valInput
float zoneLow = selectedEdgeInput == "VAH" ?
     edgePrice - outputBinTicksInput * syminfo.mintick :
     edgePrice
float zoneHigh = selectedEdgeInput == "VAH" ?
     edgePrice :
     edgePrice + outputBinTicksInput * syminfo.mintick
float zoneCenter = math.avg(zoneLow, zoneHigh)

bool activeWindow = validContract and
     time >= effectiveStartInput and
     time < effectiveEndInput

color haloColor = color.new(color.rgb(132, 145, 156), 88)
color centerColor = color.new(color.rgb(132, 145, 156), 30)
color labelColor = color.new(color.rgb(132, 145, 156), 72)

upperBoundPlot = plot(
     activeWindow ? zoneHigh : na,
     "EXP zone upper",
     color = color.new(centerColor, 100),
     display = display.all)
lowerBoundPlot = plot(
     activeWindow ? zoneLow : na,
     "EXP zone lower",
     color = color.new(centerColor, 100),
     display = display.all)
fill(upperBoundPlot, lowerBoundPlot, color = haloColor, title = "EXP zone halo")
plot(
     activeWindow ? zoneCenter : na,
     "EXP zone center",
     color = centerColor,
     linewidth = 1,
     style = plot.style_linebr)

var label fixtureLabel = na
if activeWindow
    if na(fixtureLabel)
        fixtureLabel := label.new(
             time,
             zoneCenter,
             "EXP VA EDGE " + str.tostring(edgePrice, format.mintick),
             xloc = xloc.bar_time,
             yloc = yloc.price,
             color = labelColor,
             style = label.style_label_left,
             textcolor = color.rgb(224, 228, 232),
             size = size.tiny)
    else
        label.set_x(fixtureLabel, time)
        label.set_y(fixtureLabel, zoneCenter)
        label.set_text(
             fixtureLabel,
             "EXP VA EDGE " + str.tostring(edgePrice, format.mintick))

plot(
     activeWindow ? 1.0 : 0.0,
     "Fixture.Active",
     display = display.data_window)
plot(
     validContract ? edgePrice : na,
     "Fixture.EdgePrice",
     display = display.data_window)
plot(
     validContract ? zoneLow : na,
     "Fixture.ZoneLow",
     display = display.data_window)
plot(
     validContract ? zoneHigh : na,
     "Fixture.ZoneHigh",
     display = display.data_window)