added metric for multiplier

[Siddharth2207]

Motivation

Binding and charting buys and sells when twap identity is used for TKN tranche ratio denominations.

Solution

Add bindings for tranche-space when tranche ratio/base are denominated in token like WETH. Update the plottables binding, so the effective price denominated in USD can be plotted in the chart for when the twap identity is used for buys and sells.

Checks

• Update bindings to have twap identity for buy and sell
• unit-tested any new functionality
• Update plottables binding to have effective price denominated in USD on the stack.

[thedavidmeister]

@hardyjosh @Siddharth2207 @dcatki rainlanguage/rain.orderbook#675 i wonder if we should do this before we merge this?

[Siddharth2207]

@hardyjosh @Siddharth2207 @dcatki rainlanguage/rain.orderbook#675 i wonder if we should do this before we merge this?

I agree with the issue, provided it's not a scope creep in the existing work.