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In this communication we test the suitability of a novel information directionality indicator based on ordinal patterns when applied to real world data.Specically,this indicator is a mutual information of transcripts,a concept that exploits the group-theoretical structure of ordinal patterns.To that end we use brain recording data and compare the results with those obtained with symbolic transfer entropy,an ordinal pattern-based version of transfer entropy.The comparison turns out to be positive and conrms previous numerical simulations.