title: Plotting Weekly Tick Data From A Year Time Series
body: <p>I have a time series that lists tick price data for a futures contract for a few months worth of trading history.  I would like to have one plot (line chart) that shows the trading history of the tick data for each week for the most recent 4 weeks in the time series (the series is continually being updated)</p>
  
  <p>The X axis will show the days Monday to Friday and there will be 4 separate lines on the chart at any one time detailing the tick data. I have managed to do this using some code that plots the last trade on each day but I need the tick data plotting instead of just one data point per day for each line. </p>
  
  <p>Here is an Excel Chart (!) of what I am trying to represent with tick data, only the lines will be a lot more volatile as there will be more data points.<br>
  Essentially, 4 lines on one chart showing the past four weeks of trading tick data:</p>
  
  <p><img src="https://i.stack.imgur.com/O9lDF.png" alt="weekly plot"></p>
  
  <p><em>I don't have the code that I tried with me (its at work) but can upload tomorrow.</em></p>