lib_session_gapsLibrary "lib_session_gaps"
simple lib to calculate the gaps between sessions
time_gap()
calculates the time gap between this and previous session (in case of irregular end of previous session, considering extended sessions)
Returns: the time gap between this and previous session in ms (time - time_close )
bar_gap()
calculates the bars missing between this and previous session (in case of irregular end of previous session, considering extended sessions)
Returns: the bars virtually missing between this and previous session (time gap / bar size in ms)
Session
Sessions KillZones Library [TradingFinder]🔵 Introduction
"The Forex Trading Sessions" highlight the active periods across different markets where significant trading volume and influence on the forex market are evident. The primary trading sessions globally include the "Asian Session," "London Session," and "New York Session."
A "Kill Zone" refers to a segment within a session characterized by high trading volume and notably sharper price movements. Consequently, there's a higher probability of encountering price action setups within these zones. Traders capitalize on this phenomenon in pursuit of more successful trading outcomes.
If you aim to integrate sessions or kill zones into your indicators or strategies, utilizing this library can amplify the precision and efficiency of your Python script development.
🔵 How to Use
First, you can add the library to your code as shown in the example below:
import TFlab/SessionAndKillZoneLibrary_TradingFinder/1
🟣 Parameters
SessionDetector(Session_Name, Session_Time, KillZone_Time, Session_Show, KillZone_Show, AreaUpdate, MoreInfo, Session_Color, Info_Color) =>
Parameters:
•Session_Name (string)
•Session_Time (string)
•KillZone_Time (string)
•Session_Show (bool)
•KillZone_Show (bool)
•AreaUpdate (string)
•MoreInfo (bool)
•Session_Color (color)
•Info_Color (color)
Session_Name : You must enter the session name in this parameter.
Session_Time : Enter here the start and end time of the session, which should be based on the UTC time zone.
KillZone_Time : Enter the start and end times of the kill zone, which should be based on the UTC time zone, here.
Session_Show : You can control whether or not to show the session using this entry. You must set true to display and false to not display.
KillZone_Show : Using this input you can control whether the kill zone is displayed or not. You must set true to display and false to not display.
AreaUpdate : If you want the session to be determined based on the time and high and low of the session itself, you must enter "Session" and if you want the area to be determined based on the time and high and low of the kill zone, you must enter "Kill Zone".
MoreInfo : If you want more information, you should set this entry to true, otherwise set to false. This information includes the number of candles in the area, the length of time in the area and the volume of transactions in the area.
Session_Color : Enter your desired color to display the session at this section. It is recommended to use bright and sharp colors.
Info_Color : Enter your desired color to display more information in this section.
🔵 Function Outputs
The outputs of this function are direct and indirect.
🟣 Indirect outputs
These outputs include session display, kill zone display, and time and volume information of session or kill zone.
🟣 Direct outputs
There are 8 direct outputs, which are:
Session Time : If the Session is active, it outputs 1, and if the Session is inactive, it outputs 0.
Kill Zone Time : If the Kill Zone is active, it outputs 1, and if the Kill Zone is inactive, it outputs 0.
Open : Session opening price.
High : The highest price of the session.
Low : The lowest price of the session.
Close : The last price of the session.
Low Touch Alert : If "Area Update" is in "Kill Zone" mode, if the price reaches the lowest price of the kill zone in the same session after the end of the kill zone, this output will be true. You can use this output to create an alert.
High Touch Alert : If "Area Update" is in "Kill Zone" mode, if the price reaches the highest price of the kill zone in the same session after the end of the kill zone, this output will be true. You can use this output to create an alert.
Important : To use "Open", "High", "Low" and "Close", "Area Update" must be in "Session" mode.
chrono_utilsLibrary "chrono_utils"
📝 Description
Collection of objects and common functions that are related to datetime windows session days and time ranges. The main purpose of this library is to handle time-related functionality and make it easy to reason about a future bar checking if it will be part of a predefined session and/or inside a datetime window. All existing session functionality I found in the documentation e.g. "not na(time(timeframe, session, timezone))" are not suitable for strategy scripts, since the execution of the orders is delayed by one bar, due to the script execution happening at the bar close. Moreover, a history operator with a negative value that looks forward is not allowed in any pinescript expression. So, a prediction for the next bar using the bars_back argument of "time()"" and "time_close()" was necessary. Thus, I created this library to overcome this small but very important limitation. In the meantime, I added useful functionality to handle session-based behavior. An interesting utility that emerged from this development is data anomaly detection where a comparison between the prediction and the actual value is happening. If those two values are different then a data inconsistency happens between the prediction bar and the actual bar (probably due to a holiday, half session day, a timezone change etc..)
🤔 How to Guide
To use the functionality this library provides in your script you have to import it first!
Copy the import statement of the latest release by pressing the copy button below and then paste it into your script. Give a short name to this library so you can refer to it later on. The import statement should look like this:
import jason5480/chrono_utils/2 as chr
To check if a future bar will be inside a window first of all you have to initialize a DateTimeWindow object.
A code example is the following:
var dateTimeWindow = chr.DateTimeWindow.new().init(fromDateTime = timestamp('01 Jan 2023 00:00'), toDateTime = timestamp('01 Jan 2024 00:00'))
Then you have to "ask" the dateTimeWindow if the future bar defined by an offset (default is 1 that corresponds th the next bar), will be inside that window:
// Filter bars outside of the datetime window
bool dateFilterApproval = dateTimeWindow.is_bar_included()
You can visualize the result by drawing the background of the bars that are outside the given window:
bgcolor(color = dateFilterApproval ? na : color.new(color.fuchsia, 90), offset = 1, title = 'Datetime Window Filter')
In the same way, you can "ask" the Session if the future bar defined by an offset it will be inside that session.
First of all, you should initialize a Session object.
A code example is the following:
var sess = chr.Session.new().from_sess_string(sess = '0800-1700:23456', refTimezone = 'UTC')
Then check if the given bar defined by the offset (default is 1 that corresponds th the next bar), will be inside the session like that:
// Filter bars outside the sessions
bool sessionFilterApproval = view.sess.is_bar_included()
You can visualize the result by drawing the background of the bars that are outside the given session:
bgcolor(color = sessionFilterApproval ? na : color.new(color.red, 90), offset = 1, title = 'Session Filter')
In case you want to visualize multiple session ranges you can create a SessionView object like that:
var view = SessionView.new().init(SessionDays.new().from_sess_string('2345'), array.from(SessionTimeRange.new().from_sess_string('0800-1600'), SessionTimeRange.new().from_sess_string('1300-2200')), array.from('London', 'New York'), array.from(color.blue, color.orange))
and then call the draw method of the SessionView object like that:
view.draw()
🏋️♂️ Please refer to the "EXAMPLE DATETIME WINDOW FILTER" and "EXAMPLE SESSION FILTER" regions of the script for more advanced code examples of how to utilize the full potential of this library, including user input settings and advanced visualization!
⚠️ Caveats
As I mentioned in the description there are some cases that the prediction of the next bar is not accurate. A wrong prediction will affect the outcome of the filtering. The main reasons this could happen are the following:
Public holidays when the market is closed
Half trading days usually before public holidays
Change in the daylight saving time (DST)
A data anomaly of the chart, where there are missing and/or inconsistent data.
A bug in this library (Please report by PM sending the symbol, timeframe, and settings)
Special thanks to @robbatt and @skinra for the constructive feedback 🏆. Without them, the exposed API of this library would be very lengthy and complicated to use. Thanks to them, now the user of this library will be able to get the most, with only a few lines of code!
SetSessionTimesIndiaLibrary "SetSessionTimesIndia"
This library might be useful to code an indicator or strategy that requires to call Indian trading sessions at NSE and MCX.
SetSessionTimes()
DailyLevelsLibrary "DailyLevels"
Functions for acquiring daily timeframe data by number of prior days.
openD(daysPrior, spec, res) Gets the open for the number of days prior.
Parameters:
daysPrior : Number of days back to get the open from.
spec : session.regular (default), session.extended or other time spec.
res : The resolution (default = '1440').
Returns: The open for the number of days prior.
highD(daysPrior, extraForward, spec, res) Gets the highest value for the number of days prior.
Parameters:
daysPrior : Number of days back to get the high from.
extraForward : Number of extra days forward to include.
spec : session.regular (default), session.extended or other time spec.
res : The resolution (default = '1440').
Returns: The high for the number of days prior.
lowD(daysPrior, extraForward, spec, res) Gets the lowest value for the number of days prior.
Parameters:
daysPrior : Number of days back to get the low from.
extraForward : Number of extra days forward to include.
spec : session.regular (default), session.extended or other time spec.
res : The resolution (default = '1440').
Returns: The low for the number of days prior.
closeD(daysPrior, spec, res) Gets the close for the number of days prior.
Parameters:
daysPrior : Number of days back to get the open from. 0 produces the current close
spec : session.regular (default), session.extended or other time spec.
res : The resolution (default = '1440').
Returns: The close for the number of days prior.
hlc3D(daysPrior, extraForward, spec, res) Gets the HLC3 value for the number of days prior.
Parameters:
daysPrior : Number of days back to get the HLC3 from.
extraForward : Number of extra days forward to include. Determines the closing value.
spec : session.regular (default), session.extended or other time spec.
res : The resolution (default = '1440').
Returns: The HLC3 for the number of days prior.
SessionInfoLibrary "SessionInfo"
Utility functions for session specific information like the bar index of the session.
inSession(spec) Returns true if the current bar is in the session specification.
Parameters:
spec : session.regular (default), session.extended or other time spec.
Returns: True if the current is in session; otherwise false.
minutesToLen(minutes, multiple) Converts the number of minutes to a length to be used with indicators.
Parameters:
minutes : The number of minutes.
multiple : The length multiplier.
Returns: math.ceil(minutes * multiple / timeframe.multiplier)
bar(spec, res) Returns the intraday bar index. May not always map directly to time as a bars can be skipped.
Parameters:
spec : session.regular (default), session.extended or other time spec.
res : The resolution (default = "1440").
Returns: The integer index of the bar of the session.
isFirstBar(spec, res) Returns true if the current bar is the first one of the session.
Parameters:
spec : session.regular (default), session.extended or other time spec.
res : The resolution (default = "1440").
Returns: True if the current bar is the first one of the session.
wasLastBar(spec, res) Returns Returns true if the previous bar was the last of the session.
Parameters:
spec : session.regular (default), session.extended or other time spec.
res : The resolution (default = "1440").
Returns: True if was the last bar of the session.
LibraryCheckNthBarLibrary "LibraryCheckNthBar"
TODO: add library description here
canwestart(UTC, prd) this function can be used if current bar is in last Nth bar
Parameters:
UTC : is UTC of the chart
prd : is the length of last Nth bar
Returns: true if the current bar is in N bar
