Here are the instructions to build the 64-bit ta-lib.
Install TA-Lib C Library on Windows 10
- Download and Unzip ta-lib-0.4.0-msvc.zip
- Move the Unzipped Folder ta-lib to C:\
- Download and Install Visual Studio Community 2015
- Remember to Select [Visual C++] Feature
- Build TA-Lib Library
- From Windows Start Menu, Start [VS2015 x64 Native Tools Command Prompt]
- Move to C:\ta-lib\c\make\cdr\win32\msvc
- Build the Library nmake
- Then pip3 install ta-lib
For anyone who's having this trouble, for me re-installing my VS2019 community & re-extracting the files fixed the issue (I had the problem with my already installed VS2019 - manually installing build tools did not work).
When installing VS2019, make sure you tick the box 'desktop development with c++' under desktop/mobile section. And then follow the instructions using x64 Native Tools Command Prompt for VS 2019.