OHLC Data into time series

Hi all,

I have an excel file with around 15k OHLC quotes forex quotes. Everytime I use the MATLAB Financial Time series app for importing it just freezes. However, I need to use the technical analysis toolbox in order to generate some trading signals. Thus, I have to import the data and convert it to a FINTS object. So my question is how can this be done? If I import the data straight into Matlab and try to convert it I always get an error message.

Thnak you in advance!