What a thinkScript indicator actually is
thinkorswim, by Charles Schwab, is desktop trading software. The indicators you add to it are written in its own scripting language, thinkScript. When someone hands you an indicator, what they are really handing you is a block of thinkScript code, plain text that tells the platform what to calculate and draw. Installing it means pasting that code into thinkorswim and saving it as a named study.
That is the whole idea. There is no separate app to download and no file to drag into a folder. If you have the code, you can install the indicator. WeTradePro ships its free ThinkorSwim indicators as ready-to-paste thinkScript, so the code is right there for you to copy, no signup for the free set.
Two ways to install
There are two common methods, and it is worth knowing both so you are never stuck.
Method A, manual thinkScript import. You copy the code and paste it into a new study by hand. This is the reliable, universal method: it works no matter where the indicator came from, and it is the one every trader should know. The steps below cover it in full.
Method B, a shared link. Some indicators are distributed as a shared grid link that opens directly in thinkorswim. You click the link, choose to import when the platform asks, and the study is added automatically. It is convenient when it is offered, but you do not always get one. Manual paste always works even when all you have is the raw code, so treat Method A as your default.
The manual import, step by step
- 1. Open the thinkorswim desktop platform and go to the Charts tab.
- 2. Click the Studies icon (the beaker) at the top of the chart, then choose Edit Studies.
- 3. In the Edit Studies window, click Create at the bottom left, then New Study. This opens a blank code editor.
- 4. Delete the placeholder code that is already in the editor, then paste the entire WeTradePro thinkScript code in its place.
- 5. Give the study a name you will recognize, then click OK or Apply.
- 6. The study now shows up in your Studies list. Add it to any chart, and it is installed for good.
Menu wording moves around a little between platform versions, so if a button is not exactly where it is described, look for the closest match. The sequence is always the same: open a chart, open Edit Studies, create a new study, paste the code, name it, save.
A worked walk-through
Say you grabbed one of the free indicators from WeTradePro and copied the code to your clipboard. You open thinkorswim, click into Charts, and hit the beaker at the top of the chart. Edit Studies opens. You click Create in the bottom left, then New Study, and a small editor appears with a few lines of sample code in it. You select all of that sample code and delete it, then paste your copied thinkScript so the editor holds only the WeTradePro code. You type a name like “WTP Momentum” in the name field, click OK, and click Apply. The study drops onto your chart. From now on it lives in your Studies list, ready to add to any symbol with two clicks.
Putting the study to work
Installing the indicator is step one. The reason thinkScript is powerful is what you can do with it afterward. You can apply the study to a chart to read a symbol at a glance. You can add it as a watchlist column so it reports across every ticker on your list at once. And you can drop it into the Scan tab to hunt for the exact setup it flags across the whole market, instead of clicking through charts one by one. A single well-built study can be a chart tool, a watchlist filter, and a market-wide scanner, all from the same block of code.