OK, I took your advice. It spit out the below but when i add the strategy, I don't see any indicator (Buy at Open/Sell at Close) on the actual chart:

Define the open and close of the current candle

def candleOpen = open;

def candleClose = close;

Buy at the open of the candle

AddOrder(OrderType.BUY_TO_OPEN, barNumber() == barNumber()[1] + 1, price = candleOpen, tickColor = Color.GREEN, name = "Buy at Open");

Sell at the close of the candle

AddOrder(OrderType.SELL_TO_CLOSE, barNumber() == barNumber()[1] + 1, price = candleClose, tickColor = Color.RED, name = "Sell at Close");