Inside Bar: Also sometimes called a narrow range bar, an inside bar is a bar with a high that is lower than the previous bar’s high and a low that is higher than the previous bar’s low. Outside Bar: Also sometimes called a “mother bar”, wide range or engulfing bar, an outside bar is a bar with a high that is higher than the previous or next bar and with a low that is lower than the previous or next bar, thereby engulfing the previous bar or next bar. These “clues” are known as price action trading signals / price action patterns / price action setups or price action trading strategies.