Standard units with 55 or 100 gallon tanks. Relief valve adjustable between 50-125 psi. Steep pump curve allows for pressure settings up to 100 psi. Adjustable pressure switch with 30-150 psi set point range, 5-30 psi dead band and visible range scale.
Zestimates: Improving accuracy. Zillow says Zestimates currently have a median error rate of 8%. That may seem to be a large margin â but it has improved. The algorithm began with a 13.6% median error rate in 2006, according to Zillow. However, error rates can vary widely, depending on where you live.
The drawdown (at least according to Wikipedia), saves a peak's value, and for every value later which is lower than the value of the peak, calculated: $DD = {(peak - value) \over peak}$. The problem arises when the first peak of the trading strategy is of value 0. That forces me to divide by 0. For backtesting purposes, I always assume the net value of the robot is 0, and from that point on it makes profits or losses. Other assumptions may solve the problem, but arbitrarily; different decisions for initial value will lead to different drawdown calculation results.