Trading calculator for Fx, indices

I am in need of a skilled developer to create a standalone trading calculator for Forex (Fx) and indices. The ideal candidate should have experience in developing financial applications and be familiar with trading concepts and calculations.

Requirements:
- Develop a standalone trading calculator for both Forex and indices
- The calculator should be user-friendly and easy to navigate
- The main feature required is profit/loss calculation
- The calculator should be able to handle different trading instruments and calculate profits and losses based on user input
- The user should be able to input trade details such as entry price, stop loss, take profit, and position size
- The calculator should provide real-time calculations and display the profit/loss in both percentage and monetary value

Ideal Skills and Experience:
- Strong knowledge of trading concepts and calculations
- Proficiency in programming languages such as Python or Java
- Experience in developing financial applications or trading tools
- Familiarity with trading platforms and APIs
- Ability to work independently and meet deadlines

If you have the required skills and experience, please submit your proposal along with relevant examples of your previous work.