BTC CME Margin Zones [lfnt]

This script calculates specific price zones based on the
- daily, weekly and monthly open and the
- daily maintenance margins of CME BTC futures contracts.

Versionshinweise:

Reduced input required for better convenience!
Only the current year and month are required from now on.

Versionshinweise:

Included functionality:
- option to plot margin zones from previous days
- option to not plot the first candle of the open (useful when plotting previous days zones without connecting the days)

Minor improvements

NOTE: Take care that you have always selected the correct CME contract Year and Month on the input panel!

Versionshinweise:

Included functionality:
- "Offset Of Labels" can be set individually on the input panel

Versionshinweise:

bug fixes

Versionshinweise:

minor code improvements

Versionshinweise:

alignment of automatic selection of running CME contracts acc. to CME specs

Versionshinweise:

- removal of confirmation pop-up panel at indicator open
- shorter labels for the Open levels and Margin Zones for a cleaner look

Versionshinweise:

script is now updated to Pine Script v4

Included functionality:
- plotting CME daily high and low limits of all running contracts as zones (covering the minimum and maximum prices)
- label with CME daily settlement prices of all running contracts

Versionshinweise:

Updated to consider the revised CME specifications for the Bitcoin Futures with regards to the listed contracts:
- Monthly contracts listed for 6 consecutive months and 2 additional Dec contract months. If the 6 consecutive months includes Dec, list only 1 additional Dec contract month.

Further minor improvements.