I have been using the TWS API and I found that some symbols do not return the previous closing price. I request 15 symbols and randomly for some the price of the previous closing is not returned. The rest of the stream (bid, ask, etc.) returns ok.
If I run the request again, the price of the previous day brings it for some that did not before, and for another that did not bring, now it does. it is very random.
If I run the request again, the price of the previous day brings it for some that did not before, and for another that did not bring, now it does. it is very random.