//@version=5
// Baroq Gold Sessions and Ranges. Open source under the Mozilla Public License 2.0, (c) 2026 Baroq Tech.
// Draws the Asia, London and New York sessions as boxes that grow with each session's high and low, and writes each
// range's size on its box. Education and chart reading only: it never trades and it is not advice.
indicator("Baroq Gold Sessions and Ranges", shorttitle="Baroq Sessions", overlay=true, max_boxes_count=300)

tz         = input.string("UTC", "Time zone of the session hours", tooltip="For example UTC, Europe/London or America/New_York")
asiaOn     = input.bool(true, "Asia", inline="asia", group="Sessions")
asiaSess   = input.session("0000-0700", "", inline="asia", group="Sessions")
asiaCol    = input.color(color.new(#7e8ce0, 0), "", inline="asia", group="Sessions")
londonOn   = input.bool(true, "London", inline="ldn", group="Sessions")
londonSess = input.session("0700-1300", "", inline="ldn", group="Sessions")
londonCol  = input.color(color.new(#e8c36a, 0), "", inline="ldn", group="Sessions")
nyOn       = input.bool(true, "New York", inline="ny", group="Sessions")
nySess     = input.session("1300-2000", "", inline="ny", group="Sessions")
nyCol      = input.color(color.new(#4fb08a, 0), "", inline="ny", group="Sessions")
showSize   = input.bool(true, "Write the range size on each box")

session(on, sess, col, name) =>
    var box b = na
    var float hi = na
    var float lo = na
    inSess = on and timeframe.isintraday and not na(time(timeframe.period, sess, tz))
    if inSess and (na(inSess[1]) or not inSess[1])
        hi := high
        lo := low
        b := box.new(bar_index, high, bar_index, low, border_color=color.new(col, 30), bgcolor=color.new(col, 88),
                     text=name, text_size=size.small, text_color=col, text_halign=text.align_left, text_valign=text.align_top)
    else if inSess
        hi := math.max(hi, high)
        lo := math.min(lo, low)
        box.set_top(b, hi)
        box.set_bottom(b, lo)
        box.set_right(b, bar_index)
    if inSess and showSize
        box.set_text(b, name + "  " + str.tostring(hi - lo, format.mintick))
    inSess

session(asiaOn, asiaSess, asiaCol, "Asia")
session(londonOn, londonSess, londonCol, "London")
session(nyOn, nySess, nyCol, "New York")