Yes you have to repeat the orders as STOP and LIMIT orders only last one bar and are then cancelled so you have to place a new order at every bar.

Unfortunately there is no coding solution that I know of to overcome the new higher margins – the only solution I’m afraid to say is a bigger bank balance to start with! 🙂

I don’t really like strategies that chop and change from long to short opening and closing positions just because now long looks like a good idea and in the next moment closing what could have been a good trade if given some room just to go the opposite way. I much prefer two completely separate strategies – one long and one short. Most markets have very different characteristics when going down compared to up so I see no reason to combine the two. It is simpler to keep them separate even if it means that sometimes you might be long as well as short at the same time.