The Backtester already has the ability to "maintain <n> positions."

I am suggesting that the test may also be configured to maintain some (one) measure at the time of making a purchase decision.

Example: "Try to maintain RV > 1.00"

Sometimes, it is correct to buy-in to a stock with RV < 1. But, the prudent investor needs to avoid collecting too many RV<1. The portfolio should be evaluated as a whole (I know the concept of viewing the average of the portfolio can be found in presentations).

The same could be said for RT. If current positions have suddenly accelerated to an average RT of 1.7, it seems like a mistake to pile into another position whose RT is already "high."