TTType is meant to be an esolang plugin, meaning it is something that works with any programming language when properly implemented.
TTType simulates a market for every symbol or reserved words used in a programming language.
Here, TTType is used as a plugin on top of brainf***.
There are four sections: the portfolio, the code window, the terminal and the market.
Prices will change as you type, so keep an eye on the market !