HMA Trigger

Small job. Would like the same functionality in the HMA indicator with one addition. I would like a trigger file written to disk when the trend changes. So if the indicator changes from a sell to a buy, write a trigger file with three lines; Time frame, on first line, Symbol() on second line and trend (Buy or Sell) on the third line. The file name to follow this example; EURUSD_M30.txt So the pair (current chart) followed by the time frame of the current chart.