function get_asset {

  g_echo_note "RUNNING FUNCTION ${FUNCNAME} $@"
  local f_ASSET="$1"

  # write asset hist file
  local f_ASSET_HIST_FILE="asset-histories/${f_ASSET}.history-raw.csv"

  if find "${f_ASSET_HIST_FILE}" -mmin -${INTERVAL_MIN} | grep -q "${f_ASSET_HIST_FILE}"
  then
    g_echo_note "${f_ASSET_HIST_FILE} already downloaded in the last ${INTERVAL_MIN} minutes"
    return 0
  fi
 


  [ -f "${f_ASSET_HIST_FILE}" ] || echo "Date and Time,Price" >"${f_ASSET_HIST_FILE}"
  if ! grep -q "^$(echo "${f_timestamp}" | cut -d: -f1,2)" "${f_ASSET_HIST_FILE}"
  then
    local f_line="${f_timestamp},$(egrep "^${f_ASSET}," EXCHANGE_GET_ASSETS_CMD_OUT | cut -d, -f2)"
    echo "${f_line}" >>${f_ASSET_HIST_FILE}

    local f_linecount=0
    local f_last_price=0
    local f_lines="$(tail -n 51 "${f_ASSET_HIST_FILE}" | wc -l)"
    
    for f_price in $(tail -n 50 "${f_ASSET_HIST_FILE}" | grep "^[0-9]" | cut -d, -f2)
    do
      if [ "${f_last_price}" == "${f_price}" ]
      then
        continue
      fi
      let "f_linecount+=1"
      f_last_price=${f_price}
    done

    if [ ${f_linecount} -le 3 ] && [ ${f_lines} -ge 50 ]
    then
      g_echo_note "${f_ASSET_HIST_FILE}: price seems not to change - ignoring"
      return 0
    fi
    
    [ ${FULL_LOOP} == 0 ] && return 0

    f_ASSET_HIST_FILE="asset-histories/${f_ASSET}.history.csv"
    if find "${f_ASSET_HIST_FILE}" -mmin -${INTERVAL_MIN} | grep -q "${f_ASSET_HIST_FILE}"
    then
      g_echo_note "${f_ASSET_HIST_FILE} already downloaded in the last ${INTERVAL_MIN} minutes"
      return 0
    fi

    # headline
    #[ -s "${f_ASSET_HIST_FILE}" ] || echo "${csv_headline}" >"${f_ASSET_HIST_FILE}"
    if [ -s "${f_ASSET_HIST_FILE}" ]
    then
      sed -i -e 1c"$csv_headline" "${f_ASSET_HIST_FILE}"
    else
      echo "$csv_headline" >"${f_ASSET_HIST_FILE}"
    fi

    # date and price
    echo -n "${f_line}" >>${f_ASSET_HIST_FILE}

    # calculate price change percentage
    f_last_price=$(tail -n2 ${f_ASSET_HIST_FILE} | head -n1 | cut -d, -f2)
    if echo $f_last_price | grep -q "^[0-9]"
    then
      f_price=$(tail -n1 ${f_ASSET_HIST_FILE} | cut -d, -f2)
      g_percentage-diff ${f_last_price} ${f_price}
      local f_price_change=${g_percentage_diff_result}
    else
      local f_price_change=""
    fi
    echo -n ",${f_price_change}" >>"${f_ASSET_HIST_FILE}"
    
    # calculate macd and rsi
    get_macd_indicator ${f_ASSET_HIST_FILE}
    get_rsi_indicator ${f_ASSET_HIST_FILE} 5
    get_rsi_indicator ${f_ASSET_HIST_FILE} 14
    get_rsi_indicator ${f_ASSET_HIST_FILE} 21
    get_rsi_indicator ${f_ASSET_HIST_FILE} 720
    get_rsi_indicator ${f_ASSET_HIST_FILE} 60
    get_rsi_indicator ${f_ASSET_HIST_FILE} 120
    get_rsi_indicator ${f_ASSET_HIST_FILE} 240
    get_rsi_indicator ${f_ASSET_HIST_FILE} 480
      
    # get coingecko price change
    local f_asset=$(echo ${f_ASSET} | sed "s/${CURRENCY}\$//" | tr '[:upper:]' '[:lower:]')
    echo -n ,$(jq -r ".[] |select(.symbol==\"${f_asset}\")|\"\\(.price_change_percentage_24h_in_currency)\"" COINGECKO_GET_ASSETS_CMD_OUT) >>${f_ASSET_HIST_FILE}
    echo -n ,$(jq -r ".[] |select(.symbol==\"${f_asset}\")|\"\\(.price_change_percentage_7d_in_currency)\"" COINGECKO_GET_ASSETS_CMD_OUT) >>${f_ASSET_HIST_FILE}
    echo -n ,$(jq -r ".[] |select(.symbol==\"${f_asset}\")|\"\\(.price_change_percentage_14d_in_currency)\"" COINGECKO_GET_ASSETS_CMD_OUT) >>${f_ASSET_HIST_FILE}
    echo -n ,$(jq -r ".[] |select(.symbol==\"${f_asset}\")|\"\\(.price_change_percentage_30d_in_currency)\"" COINGECKO_GET_ASSETS_CMD_OUT) >>${f_ASSET_HIST_FILE}
    echo -n ,$(jq -r ".[] |select(.symbol==\"${f_asset}\")|\"\\(.price_change_percentage_1y_in_currency)\"" COINGECKO_GET_ASSETS_CMD_OUT) >>${f_ASSET_HIST_FILE}
    echo -n ,$(jq -r ".[] |select(.symbol==\"${f_asset}\")|\"\\(.market_cap_change_percentage_24h)\"" COINGECKO_GET_ASSETS_CMD_OUT) >>${f_ASSET_HIST_FILE}

    # range and fibonacci
    if ! get_range ${f_ASSET_HIST_FILE}
    then
      local f_oldrange=$(tail -n2 ${f_ASSET_HIST_FILE} | head -n1 | cut -d, -f24,25,26,27,28,29,30,31,32,33,34,35)
      #g_echo_note "Taking old range ${f_oldrange}"
      echo -n ",${f_oldrange}" >>$f_ASSET_HIST_FILE
    fi

    # Calculate EMA 50:36 100:37 200:38 800:39
    local f_calcemanumcolumn
    for f_calcemanumcolumn in 50:36 100:37 200:38 800:39
    do
      local f_calcema=$(echo ${f_calcemanumcolumn} | cut -d: -f1)
      local f_caclemacolumn=$(echo ${f_calcemanumcolumn} | cut -d: -f2)
      local f_last_ema="$(tail -n2 "${f_ASSET_HIST_FILE}" | head -n1 | grep "^[0-9]" | cut -d, -f${f_caclemacolumn})"
      if [ -z "${f_last_ema}" ] || [ -z "${f_price}" ] 
      then
        get_ema "${f_ASSET_HIST_FILE}" 2 ${f_calcema} 
      else
        get_ema "${f_ASSET_HIST_FILE}" 2 ${f_calcema} "${f_last_ema}" "${f_price}"
      fi
      if [ -z "${f_ema}" ]
      then
        echo -n "," >>"${f_ASSET_HIST_FILE}"
      else
        echo -n ",${f_ema}" >>"${f_ASSET_HIST_FILE}"
      fi
    done

    # get coingecko price
    echo -n ,$(jq -r ".[] |select(.symbol==\"${f_asset}\")|\"\\(.current_price)\"" COINGECKO_GET_ASSETS_CMD_OUT) >>${f_ASSET_HIST_FILE}

    # end with newline
    echo "" >>${f_ASSET_HIST_FILE}
  fi
}