Lol, always cracks me up when folks find bits and pieces and ask for them later on. So what you have found there, my MACD_Mod indicator. This was made back in the day before the current built in version colored the histogram with dark and light green above the zero line and dark and light red below the zero line. Somewhere along the line Thinkorswim decided to upgrade theirs to include this dynamic color scheme to their own version. However the MACD_Mod does contain one other small tweak.
In the built-in version they compute the histogram as follows:
plot Diff = (value - avg);
My modified version is like this:
plot Diff = (value - avg) * 3;
That’s all I’ve done. I’ve taken the histogram and inflated it to three times its usual size. Why? Because sometimes that histogram can get swallowed up and lost when the value line of the MACD makes wide swings. (such as happens when a stock is trending strongly in one direction).
So there you have it, mystery solved. No unicorns or UFO’s, no Holy Grail. Just a plain old MACD.