Investing Performance with vs without fees

22 feb 2023

Hello traders,

I had a chat with a friend recently who's using a fund manager services to invest for him in some US-based ETFs tracking the US indices.

I showed him using an online tool that those 2% annual fees he's paying to his fund manager are eating a lot of his profit overtime.

As I had some time, I decided to code this simulator in Pinescript because .... why not :)
RicardoSantos already did that Compound Interest function (tradingview.com/script/woq6TTda-FunctionCompoundInterest/)
I added the n parameter being the number of times the interest is compounded per unit of time

Compound interest is calculated using the following formula

CI = P*(1 + R/n) (n*t) – P

Here,

• P is the principal amount.
  
• R is the annual interest rate.
  
• t is the time the money is invested or borrowed for.
  
• n is the number of times that interest is compounded per unit t, for example if interest is compounded monthly and t is in years then the value of n would be 12.
  If interest is compounded quarterly and t is in years then the value of n would be 4.
  

For now, the script only works on a yearly chart - I might update it later making it compatible with other chart timeframes - assuming there is some demand for it
If there is, let me know in the comments down below

All the best
Dave