thinkscript Volume > Open Interest Heatmap Column for thinkorswim (FREE)

# Volume vs Open Interest Heatmap Column to show interest and key levels dynamically update as volume updates.

# Version: v1.3 – 2025-08-22

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

# Platform: Thinkorswim desktop only:

# NOTICE: Only updates during regular trading hours.

# Thinkscript Features:

# - Plots the difference between Volume and Open Interest (Vol - OI)

# - Highlights strikes with rising real-time volume compared to static OI

# - Useful to detect "volume waking up" against known OI walls

# - Blue gradient shows aggressiveness of positioning

# - Label color adapts to maintain contrast and readability

# - Hide's volume when it is < OI and < 10000 to help reduce noise. Adjustable.

# - Updated with an additional script to view lower data that are can be used on later expirations (See preview image)

# Best Use:

# - Spotting early aggression into passive zones

# - Static walls with sudden volume bursts

# - Ideal in low-volume environments to track emerging strikes

# - Configuration is setup for for SPX 0DTE. Thresholds can be adjust to your likings.

# - Easy Install

#

# Notes:

# - Apply as custom column in Option Chain

# - Only updates during RTH