Can ‘Remaining Debt’ be a metric available when building a custom plot?

Would love to combine this with other metrics * Debt Payment Breakdown + Remaining Debt where payments are a stacked bar, and remaining debt is a line

• Remaining Debt + Passive Income where remaining debt is a stacked bar and passive income is a line

At some point in my plan, there is a trigger where just paying off the remaining debt makes sense, so would love to have that metric (remaining debt) be added to other metrics.