Expected Behavior

Support Variable Index Dynamic Average (VIDYA) indicator

Actual Behavior

Not supported

Potential Solution

Implements VIDYA (formula)

Checklist

• I have completely filled out this template
• I have confirmed that this issue exists on the current master branch
• I have confir

According to @rspadim, functions in entropy.py could use numpy array instead of strings, as it's better to numba.

Guide on how to implement this is available in the comments in PR #311 .

Heston model has accurate density approximations for European option prices, which are of interest.

The module implementing this method should live under tf_quant_finance/volatility/heston_approximation.py. It should support both European option puts and calls approximations. Tests should be in heston_approximation_test.py in the same folder.

MMEX version:

• 1.3.6
• 1.3.5
• 1.3.4 or older
• 1.4.X

Note: bug reporters are expected to have verified the bug still exists
either in the last stable version of MMEX or on updated development code
(master branch).

Operating System:

• Windows
• Mac OSX
• Linux

Description of the bug

Application crash when selecting 'Relocate Payee' when i