tradingview hhmm-start-end inside

There are two approaches.



1) Reliable:
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Time_zone	= input(-7, title="Your Timezone (i.e. -4)")
gmt_phrase  = Exchange_time ? syminfo.timezone : "GMT"+(Time_zone>0 ? "+" : "") + tostring(Time_zone)
tz_time     = timestamp(syminfo.timezone, year, month, dayofmonth, hour, minute)
chosen_time = timestamp(gmt_phrase, year, month, dayofmonth, hour, minute)
tz_diff     = (tz_time-chosen_time)/(3600000)//i.e. 1
Time_zone_final=tz_diff //cant be used in "time" function
t1 = timestamp(gmt_phrase, year, month, dayofmonth, HHMM_start/100-tz_diff, HHMM_start%100)
t2 = timestamp(gmt_phrase, year, month, dayofmonth + (HHMM_start<HHMM_end?0:1), HHMM_end/100-tz_diff, HHMM_end%100)
times_inside =  timeframe.isdwm or chosen_time >= t1 and chosen_time<t2



2) Exchange-time dependant:
####
Time_zone_diff= input(-2, title="Your Timezone difference from exchange timezone")
WorkingDays	= input(1234567)
HHMM_start_final = (HHMM_start- Time_zone_diff*100 + 2400) % 2400
HHMM_end_final   = (HHMM_end  - Time_zone_diff*100 + 2400) % 2400
Time_session= (HHMM_start_final<1000 ? "0" : "" ) + tostring(HHMM_start_final)+"-"+ (HHMM_end_final<1000 ? "0" : "" ) + tostring(HHMM_end_final)
times_inside= timeframe.isdwm or not na(time(timeframe.period, Time_session+":"+tostring(WorkingDays)))


##########

show_time_limits = input(true, title="For testing purposes, visually see marks when within allowed times")
plotchar(show_time_limits and times_inside ? highest(high,50) : na , title="within allowed times", color=color.green, char="", location=location.absolute, text="✓\n⏰")