Session Boxes

//@version=6
indicator("Session Boxes — Futures Signal Engine", overlay=true, max_boxes_count=500)

// ── Inputs ──────────────────────────────────────────────────────────────────
showPreMkt  = input.bool(true, "Pre-Market (4:00-9:30)")
showNYOpen  = input.bool(true, "NY Open (9:30-11:00)")
showLunch   = input.bool(true, "Lunch (11:00-13:00)")
showAftn    = input.bool(true, "Afternoon (13:00-15:00)")
showClose   = input.bool(true, "Close (15:00-16:00)")
showRange   = input.bool(true, "Show Session Range Labels")

preMktColor = input.color(color.new(color.blue, 90), "Pre-Market Color")
nyOpenColor = input.color(color.new(color.green, 90), "NY Open Color")
lunchColor  = input.color(color.new(color.yellow, 92), "Lunch Color")
aftnColor   = input.color(color.new(color.green, 90), "Afternoon Color")
closeColor  = input.color(color.new(color.orange, 90), "Close Color")

// ── Session tracking ────────────────────────────────────────────────────────
nyHour   = hour(time, "America/New_York")
nyMinute = minute(time, "America/New_York")

// Session boundary detection
isPreMktStart = nyHour == 4  and nyMinute == 0
isNYOpenStart = nyHour == 9  and nyMinute == 30
isLunchStart  = nyHour == 11 and nyMinute == 0
isAftnStart   = nyHour == 13 and nyMinute == 0
isCloseStart  = nyHour == 15 and nyMinute == 0
isCloseEnd    = nyHour == 16 and nyMinute == 0

// Track session highs/lows
var float sessHigh = na
var float sessLow  = na
var int   sessStart = na
var string sessName = ""

// ── NY Open session box ────────────────────────────────────────────────────
var float nyoHigh = na
var float nyoLow  = na
var int   nyoStart = na

if isNYOpenStart
    nyoHigh  := high
    nyoLow   := low
    nyoStart := bar_index

inNYOpen = nyHour >= 9 and nyMinute >= 30 and nyHour < 11
if inNYOpen and not isNYOpenStart
    nyoHigh := math.max(nz(nyoHigh, high), high)
    nyoLow  := math.min(nz(nyoLow, low), low)

if showNYOpen and isLunchStart and not na(nyoHigh)
    box.new(nyoStart, nyoHigh, bar_index, nyoLow, border_color=color.new(color.green, 60), bgcolor=nyOpenColor, border_width=1)
    if showRange
        label.new(nyoStart, nyoHigh, "NY Open\n" + str.tostring(nyoHigh - nyoLow, format.mintick) + " range", style=label.style_label_down, textcolor=color.green, color=color.new(color.green, 85), size=size.tiny)

// ── Lunch session box ───────────────────────────────────────────────────────
var float lnchHigh = na
var float lnchLow  = na
var int   lnchStart = na

if isLunchStart
    lnchHigh  := high
    lnchLow   := low
    lnchStart := bar_index

inLunch = nyHour >= 11 and nyHour < 13
if inLunch and not isLunchStart
    lnchHigh := math.max(nz(lnchHigh, high), high)
    lnchLow  := math.min(nz(lnchLow, low), low)

if showLunch and isAftnStart and not na(lnchHigh)
    box.new(lnchStart, lnchHigh, bar_index, lnchLow, border_color=color.new(color.yellow, 60), bgcolor=lunchColor, border_width=1)
    if showRange
        label.new(lnchStart, lnchHigh, "Lunch\n" + str.tostring(lnchHigh - lnchLow, format.mintick) + " range", style=label.style_label_down, textcolor=color.yellow, color=color.new(color.yellow, 85), size=size.tiny)

// ── Afternoon session box ───────────────────────────────────────────────────
var float aftnHigh = na
var float aftnLow  = na
var int   aftnStart = na

if isAftnStart
    aftnHigh  := high
    aftnLow   := low
    aftnStart := bar_index

inAftn = nyHour >= 13 and nyHour < 15
if inAftn and not isAftnStart
    aftnHigh := math.max(nz(aftnHigh, high), high)
    aftnLow  := math.min(nz(aftnLow, low), low)

if showAftn and isCloseStart and not na(aftnHigh)
    box.new(aftnStart, aftnHigh, bar_index, aftnLow, border_color=color.new(color.green, 60), bgcolor=aftnColor, border_width=1)
    if showRange
        label.new(aftnStart, aftnHigh, "Afternoon\n" + str.tostring(aftnHigh - aftnLow, format.mintick) + " range", style=label.style_label_down, textcolor=color.green, color=color.new(color.green, 85), size=size.tiny)

// ── Close session box ───────────────────────────────────────────────────────
var float clsHigh = na
var float clsLow  = na
var int   clsStart = na

if isCloseStart
    clsHigh  := high
    clsLow   := low
    clsStart := bar_index

inClose = nyHour >= 15 and nyHour < 16
if inClose and not isCloseStart
    clsHigh := math.max(nz(clsHigh, high), high)
    clsLow  := math.min(nz(clsLow, low), low)

// Draw close box at end of day or last bar
if showClose and (isCloseEnd or (barstate.islast and inClose)) and not na(clsHigh)
    box.new(clsStart, clsHigh, bar_index, clsLow, border_color=color.new(color.orange, 60), bgcolor=closeColor, border_width=1)