Thank you. As always, a lot of food for thought.

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Check out the new article: Polynomial models in trading.
Trading efficiency largely depends on the methods of analyzing market data. One such method is orthogonal polynomials. These polynomials are mathematical functions that can be used to solve a number of problems related to trading.
The most famous orthogonal polynomials are the Legendre, Chebyshev, Laguerre and Hermite polynomials. Each of these polynomials has unique properties that allow them to be used to solve different problems. Here are some of the main ways to use them:
Let's see how orthogonal polynomials can be applied in practice.
Author: Aleksej Poljakov