The Technical Indicator DeMarker (DeM) is based on the comparison of the current and previous bars maximums. When the current maximum is situated above the previous one, the difference between them is registered. When the current maximum is situated at the same level with the previous one or above, zero volume is registered. Then, the values received for a certain period of time are summed up that will result to a numeral indicator DeMarker, which is divided by the same value plus the sum of differences between price minimums of the previous and current bars. When the price minimum is above the previous level zero, the level is fixed.