Built a free tool that calculates your exact trailing stop % so you don't have to do the math mid-trade

When I set the stock order, I always struggle with how low I should set it without selling too soon. I came to realize if I'm in the green, I should focus how much of the profit and just the profit portion, in percentage I would like to protect. 80%, 90%, 95%? and what would that stop price be?

Broker sometimes ask for % below market price but not the % relative to the profit portion. Those are two different numbers. So...

So I built a small calculator: you put in your cost base, current price, and how much of your profit you want to lock in (e.g. 90%), and it spits out:

* The exact stop-loss price
* The exact trailing stop % to type into your broker

No sign-up, no ads, works on mobile. There's a copy button so you can paste the number straight into your order form. You can even add it to your home screen on your phone.

Link: [https://stop-price-calculator.pages.dev/](https://stop-price-calculator.pages.dev/)

Happy to hear feedback. If there's a feature that would actually make this useful for how you trade, let me know.

I honestly found this tool useful. I don't ask for any fee to use this tool. Just sharing.