Why don't the charts work correctly on stocks like EEM (and sometimes IWM), etc.? The charts say they are ARCA stocks. I don't understand that because ARCA is afterhours I thought. Anyhow, shouldn't the free data for Level I properly display these charts without subscribing to extra market data? EEM does preview both in IB's TWS charts and in Quotetracker, but it previews by the second or minute, and won't change to 4 hours or a longer time period. Any suggestions? It would be nice if IB would totally stop working on further enhancements to TWS while they fix their charts. It appears that part of the problem may be the bandwidth to their backfill server.