Elliott Wave Data Window vs Start Date
MotiveWave’s Elliott Wave features can be based on a data window or by a specific start time and date. To define a data window, configure the Minimum Bars, Maximum Bars and All Available Data settings. To use a specific time and date, select the Use Date setting and set your start time and date.
It is possible to have varying wave count results while using the Auto Elliott Wave study, especially when using a data window (i.e. a look back period of 250 bars, which is the default). MotiveWave® will look for a significant high or low within the specified period to calculate and initiate the wave count. As new data presents itself, the data window may shift forward respecting it’s Minimum Bars and Maximum Bars values.
In the following example, an initial starting point was determined at a significant low (Figure 1) within the 250 bar data window. As new data presented itself, the data window shifted to the right as the Elliott Wave study recalculated and plotted the new wave count (Figure 2).
Here is another example on the (Figure 3) chart and another chart (Figure 4) of the same instrument. The Auto Elliott Wave study in both instances has a data window setting of 250 bars set for both the Minimum Bars and Maximum Bars settings.
Notice that the Elliott Wave count on the (Figure 3) chart initiates at the most significant low within the 250 daily bar data window while on the (Figure 4) chart, it initiates at the most significant high within it’s 250 daily bar data window. With data windows, MotiveWave will calculate the look back period based on the latest bars. In this case, 250 bars.
For a more consistent wave count, you can specify a start date. As with data windows, it is important that the data range contains a significant high or low in the past. Using a start date uses all available bars from the specified date up to the present bar. Unlike the data window, the look back period does not shift but instead includes all newly presented bars as part of the data range.
Please be aware that specifying a start date can cause a lot of data to load if you are changing the time frame on the chart. For example if you set a start date to be a year or two in the past on a daily chart and then switch to a 1 min chart, MotiveWave will attempt to load 2 years of minute data, which can take a long time.
In the SPY example below (Figure 5), the initial wave count was in an uptrend as determined by the Auto Elliott Wave study. As new bar data presents itself in the data range, the Auto Elliott Wave study evaluates whether or not a change is required in the plotted wave count.
In last chart below (Figure 6), new data as a lower low presents itself in the data range, which triggers a trend change. The Auto Elliott Wave Study now determines that a downtrend is in effect and displays the wave count accordingly to reflect the new state.
Figure 5 – Uptrend Using Start Date
Figure 6 – Downtrend using Start Date