LLHH_SESSION

// This source code is subject to the terms of the Mozilla Public License 2.0 at https://mozilla.org/MPL/2.0/
// © CryptoBoole

//@version=4
study("LLHH_SESSION", overlay=true, max_bars_back=1440)

// start-end of session
t = time(timeframe.period, "0001-2359:1234567")
x = barssince(na(t))

// keep session high and low
var sessionHH = float(na)
var sessionLL = float(na)

// if we are within the session calculate hh ll barsback = session
if x > 0
    sessionHH := highest(close, x)
    sessionLL := lowest(close, x)

// mark sessions
bgcolor(x == 0.0 ? color.silver : na)

// session high/low
plot(sessionHH, color=color.red)
plot(sessionLL, color=color.green)