New Stockmarket feature (Continuous order)

It would be very great if we had the option of buying from someone or selling to someone by a "continuous order", instead of making a single order, we could order like "50 tons/h" (of Oil for example), and the order will last until one of the partners goes on the stock market and cancel the deal or change it, or if some of the partners runs out of money or Oil (for example). In practise the deal between two allies could last till the end of the game if they win.

Advantages:

1, you dont need to trade every time, instead, you just occupy your mind doing other stuff.

2, you create a stronger economic tie with your partner and you can assure that you will have a partner for that resource on the long term, also your partner will have a buyer.