The problem seems to be in the extra data loaded at the session break in this case, EUR/USD at around 17:00 EST. Notice the first vertical arrow points at 16:37 on the first chart. The next chart is 13 minutes later at 16:50. The next chart should be thirteen minutes later or 17:03 but instead is 17:00. The chart after that is correct at 17:13. You can see how your 13 minute indicator now is calculating 10 minute data which is then carried over to the next session.
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The problem causes problems on Renko charts and probably others as well.
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