amibroker afl code needed

I have a Amibroker strategy with buy/sell and short/cover conditions. (I have only very basic idea about afl ) I plan to use it with algo system to place order in terminal. Some times it is repainting. To avoid it I can use some thing like Buy=ref(buy,-1); On referring previous candle to place order, slippage of price is more. So I want to use buy or short condition in current bar only with taking some risk. Is it possible to use static variable in these conditions? My requirement is as follows. [login to view URL] buy/short signal comes in AMI , Buy/short order is placed. [login to view URL] open of the next candle, AFL has to check the previous bar has the signal or not. [login to view URL] signal present, nothing to be done. [login to view URL] no signal (repainting signal) in previous candle, exit the position immediately with sell/cover order. I think this order details will not be shown in backtesting. But that is not a [login to view URL] I want to place order on a signal and want to exit on next bar , if it is a false signal. I need afl code for this particular function, that can be added with any of my afl with buy sell conditions.