function get_macd_indicator {

  #g_echo_note "RUNNING FUNCTION ${FUNCNAME} $@"
  # get histfile
  local f_hist_file="$1"

  # define or clean gloval macdvars
  f_macd_ema12=""
  f_macd_ema26=""
  f_macd=""
  f_macd_ema9_signal=""
  f_macd_signal=""

  if ! [ -s "$f_hist_file" ]
  then
    g_echo_warn "${FUNCNAME} $@: Histfile $f_hist_file does not exist or is empty"
    return 1
  fi

  # read last two lines 
  local f_lastline=$(tail -n1 "$f_hist_file" | grep ^2)
  local f_second_lastline=$(tail -n2 "$f_hist_file" | head -n1 | grep ^2)

  # Try to get current MACD values
  local f_macd_lastprice=$(echo "$f_lastline" | cut -d, -f2)
  f_macd_ema12=$(echo "$f_lastline" | cut -d, -f4)
  f_macd_ema26=$(echo "$f_lastline" | cut -d, -f5)
  f_macd=$(echo "$f_lastline" | cut -d, -f6)
  f_macd_ema9_signal=$(echo "$f_lastline" | cut -d, -f7)

  # if data is complete
  if [ -n "${f_macd_ema12}" ] && [ -n "${f_macd_ema26}" ] && [ -n "${f_macd}" ] && [ -n "${f_macd_ema9_signal}" ]
  then
    g_echo_note "${FUNCNAME} $@: Looks like current MACD was already calculated"
    return 1
  fi

  # Try to get last MACD values
  f_macd_last_ema12=$(echo "$f_second_lastline" | cut -d, -f4)
  f_macd_last_ema26=$(echo "$f_second_lastline" | cut -d, -f5)
  f_macd_last=$(echo "$f_second_lastline" | cut -d, -f6)
  f_macd_last_ema9_signal=$(echo "$f_second_lastline" | cut -d, -f7)
  f_macd_last_histogram=$(echo "$f_second_lastline" | cut -d, -f8)

  # calc EMA12 
  get_ema "${f_hist_file}" 2 12 "${f_macd_last_ema12}" "${f_macd_lastprice}"
  if [ -z "${f_ema}" ]
  then
     g_echo_note "${FUNCNAME} $@: Not enough data for calculating EMA12 - waiting for more values"
     echo -n ",,,,,," >>"${f_hist_file}"
     return 0
  fi
  f_macd_ema12=${f_ema}
  echo -n ",${f_macd_ema12}" >>"${f_hist_file}"
  
  # calc EMA26
  if [ -z "${f_macd_last_ema12}" ] 
  then
    echo -n ",,,,," >>"${f_hist_file}"
    return 0
  fi
  get_ema "${f_hist_file}" 2 26 "${f_macd_last_ema26}" "${f_macd_lastprice}"
  if [ -z "${f_ema}" ]
  then
    g_echo_note "${FUNCNAME} $@: Not enough data for calculating EMA26 - waiting for more values"
    echo -n ",,,,," >>"${f_hist_file}"
    return 0
  fi
  f_macd_ema26=${f_ema}
  echo -n ",${f_macd_ema26}" >>"${f_hist_file}"

  # calc MACD
  if [ -z "${f_macd_ema26}" ] 
  then
    echo -n ",,,," >>"${f_hist_file}"
    return 0
  fi
  #[ -z "${f_macd_ema12}" ] && return 0
  f_macd=$(echo "scale=8; ${f_macd_ema12}-${f_macd_ema26}" | bc | sed 's/^\./0./; s/^-\./-0./')
  echo -n ",${f_macd}" >>"${f_hist_file}"

  # calc MACD Signal
  if [ -z "${f_macd}" ]
  then
    echo -n ",,," >>"${f_hist_file}"
    return 0
  fi
  get_ema "${f_hist_file}" 6 9 "${f_macd_last_ema9_signal}" "${f_macd}"
  if [ -z "${f_ema}" ] 
  then
    g_echo_note "${FUNCNAME} $@: Not enough data for calculating EMA9 Signal - waiting for more values"
    echo -n ",,," >>"${f_hist_file}"
    return 0
  fi
  f_macd_ema9_signal=${f_ema}
  echo -n ",${f_macd_ema9_signal}" >>"${f_hist_file}"
  
  # calc MACD Histogram
  f_macd_histogram=$(echo "scale=10; ${f_macd}-(${f_macd_ema9_signal})" | bc | sed 's/^\./0./; s/^-\./-0./')
  echo -n ",${f_macd_histogram}" >>"${f_hist_file}"

  # check for MACD buy or sell signal
  echo ${f_macd_histogram} | grep -q "^-" && echo ${f_macd_last_histogram} | grep -q "^[0-9]" && f_macd_signal="sell"
  echo ${f_macd_histogram} | grep -q "^[0-9]" && echo ${f_macd_last_histogram} | grep -q "^-" && f_macd_signal="buy"

  # calculate MACD Histogram relation
  if [ $(tail -n36 "${f_hist_file}" | wc -l) -ge 35 ]
  then
    local f_macd_histogram_max=$(tail -n60 "${f_hist_file}" | cut -d"," -f8 | egrep "^[0-9]|^-[0-9]" | sed 's/^-//' | sort -n | tail -n1)
    local f_macd_histogram_relation=$(echo "100+$(g_percentage-diff ${f_macd_histogram_max} ${f_macd_histogram})" | bc | sed 's/^\./0./; s/^-\./-0./' | cut -d\. -f1)
  fi
  
  echo -n ",${f_macd_histogram_relation}|${f_macd_signal}" >>"${f_hist_file}"



}