 Both raw and sampled data series have been analysed for a broad range of horizons M, varying from one to twelve months over the year 2018.
<clarity>  Both raw and sampled data series have been analysed for a broad range of horizons M, varying from one to twelve months over the year 2018.
 Both raw and sampled data over a broad range of horizons M, varying from one to twelve months over the year 2018.