merge two indicators into buy, has opposite signals at same time issue

I would like to merge two indicator in one strategy with "or" condition. For instance, if I merge RSI and CCI into one strategy, I'd like to have buy signal when RSI or CCI is "long", sell signal when RSI or CCI is "short". Howver, sometimes I had issues that at same time both buy and sell signal showed up. Is there anyway to avoid this? What I would like to have is when opposite signals happends at the same time, no signal shows. Thanks!