Added price ratios wherever available in Horizon.

[GuyWhoKnowsTheGuy]

Types of changes

• [ X ] Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• [ X ] Breaking change (fix or feature that would cause existing functionality to change)
• [ X ] I have read the CONTRIBUTING document.
• [ X ] My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• [ X ] I have added tests to cover my changes.
• [ X ] All new and existing tests passed.

[GuyWhoKnowsTheGuy]

I suggest hiding whitespace when viewing the diff, I added some file level namespace formatting.

[Abduljlil]

() ؛