bject"><img src="../../../images/accumulators/form_6.png"></span> algorithm estimates a quantile dynamically without storing samples. Instead of storing the whole sample cumulative distribution, only five points (markers) are stored. The heights of these markers are the minimum and the maximum of the samples and the current estimates of the <span class="inlinemediaobject"><img src="../../../images/accumulators/form_20.png"></span>-, <span class="inlinemediaobject"><img src="../../../images/accumulators/form