> I'm using a Paper trading account, could it be that the "theoritically"
> real-time same-as-production data isn't reliable at all?   That would be
> discouraging for users like, willing to open a real account but evaluating
> the platform in the meantime

Yes, the paper-trading account is known to have a market data stream
different from that coming to the real account. The remedy is to use
the real account, and run your strategies in the JBT in the "forward
test" mode. In this mode, everything will happen as in live trading,
except that instead of submitting the orders, JBT will simulate the
fills. The other thing to consider when comparing Bollinger bands
values in JBT with those in TWS is the calculation period. As you
probably have noticed, in Bollinger bands in JBT use a moving window
of prices, and you supply the size of the window (in the number of
seconds). I have not looked at the Bollinger bands in TWS, is it done
in a similar manner where you can specify the period length?

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