# Automatic Opening Range and Fibonacci Levels
# By Prospectus @ http://readtheprospectus.wordpress.com
# Inspired by Trader-X @ http://traderx.blogspot.com
#
# This Thinkscript is designed to plot the OR high, low,
# 50% fib retrace, and fib extensions for the current day.
# This will only work correctly on time-based charts,
# where the OR timeframe is divisible by the bar period
# e.g. 30 minute OR, 10 min bars. An extra fib extension
# may be used if desired to create a target zone.
#
def na=double.nan;
#
# Define time that OR begins (in hhmm format,
# 0930 is the default):
#
input ORBegin = 0930;
#
# Define time that OR is finished (in hhmm format,
# 10:00 is the default):
#
input OREnd = 0940;
#
# Input first and second fib extension levels
# (default 1.382, 1.621):
#
Input FibExt1=1.382;
Input FibExt2=1.621;
#
# Show Today only? (Default Yes)
#
input ShowTodayOnly={"No", default "Yes"};
def s=ShowTodayOnly;
#
# Show Second fib extension? (Default No)
#
input ShowFibExt2={default "No", "Yes"};
def sf2=ShowFibExt2;
#
# Create logic for OR definition:
#
Def ORActive = if secondstilltime(OREnd)>0 AND secondsfromtime(ORBegin)>=0 then 1 else 0;
#
# Create logic to paint only current day post-open:
#
def today=if s==0 OR getday()==getlastday() AND secondsfromtime(ORBegin)>=0 then 1 else 0;
#
# Track OR High:
#
Rec ORHigh = if ORHigh[1]==0 or ORActive[1]==0 AND ORActive==1 then high else if ORActive AND high>ORHigh[1] then high else ORHigh[1];
#
# Track OR Low:
#
Rec ORLow = if ORLow[1]==0 or ORActive[1]==0 AND ORActive==1 then low else if ORActive AND low<ORLow[1] then low else ORLow[1];
#
# Calculate OR width:
#
Def ORWidth = ORHigh - ORLow;
#
# Calculate fib levels:
#
Def fib_mid = (ORHigh+ORLow)/2;
Def fib_ext_up1 = ORHigh + ORWidth*(FibExt1 - 1);
Def fib_ext_down1 = ORLow - ORWidth*(FibExt1 - 1);
Def fib_ext_up2= ORHigh + ORWidth*(FibExt2 - 1);
Def fib_ext_down2 = ORLow - ORWidth*(FibExt2 - 1);
#
# Define all the plots:
#
Plot ORH=if ORActive OR today<1 then na else ORHigh;
Plot ORL=if ORActive OR today<1 then na else ORLow;

#
# Formatting:
#
ORH.setdefaultcolor(color.green);
ORH.setStyle(curve.firm);
ORH.setlineweight(1);
ORL.setdefaultcolor(color.red);
ORL.setStyle(curve.firm);
ORL.setlineweight(1);