thinkscript High Open Interest Heatmap Column for thinkorswim (KEY LEVELS)

# High Open Interest Heatmap Column

# Author: 0DTE_SPX | https://0dtespx.gumroad.com | https://x.com/0DTE_SPX

# Platform: Thinkorswim desktop only:

# Thinkscript Features:

# - Highlights strikes with high Open Interest (calls or puts)

# - Applies heatmap style colors to help visualize OI intensity

# - Colors are tuned for visibility on light-themed platforms

# - Label text color dynamically adjusts for contrast

# NOTICE: Only updates during regular trading hours.

# Easy Install:

# Use Case:

# - Quickly identify liquidity walls, hedging pressure, or pin zones

# - Works best when used alongside GEX or Volume/OI columns

# - Scan multiple expirations to identify key levels (See preview image for example showing lots of OI resting at 6450, currently 6370)

# - Helps visualize where options traders are most positioned

# - Configured for SPX 0DTE