Today I plotted some combo charts on IB TWS charts. However, when I tried to download their historical data using excel API and through Multicharts, I couldn't do it - since those are synthetic spreads and combos which don't trade on any exchange. Pointing with mouse on any bar on the TWS Chart, it shows OHLCV prices for that bar. It is also possible to look at T&S for that bar. So, the underlying OHLCV data is present on the TWS Chart object and it must also be present somewhere in my computer (either IB folder or in cache). However, I can't find any option (right click, left click, settings) that show me the values of data present on the chart. I am stumped as to how to download the OHLCV values from the chart to the csv? Any ideas would be appreciated.