It is not possible to sell at the close of any bar as all orders go to market at the open of the bar after the decision bar. The closest you could get is to use MTF on a 1 second timeframe and sell at open of the final second of a day. MTF is not currently possible in real live trading. Also using 1 second charts seriously limits amount of back test data available for testing. It is also not possible to live trade algos on tick charts – backtesting is possible but not real live trading.