function do_trade {
  # Info for log
  g_echo_note "RUNNING FUNCTION ${FUNCNAME} $@"
  
  # needed vars
  local f_ASSET=$1
  local f_CURRENCY=$2
  local f_QUANTITY=$3
  local f_ACTION=$4  # buy or sell
  local f_COMMENT=$5
  
  local f_DATE=$(date '+%F_%H-%M-%S')
  local f_ASSET_HIST_FILE="asset-histories/${f_ASSET}${f_CURRENCY}.history.csv"

  local f_link="https://www.coingecko.com/de/munze/$(egrep -i ^${f_ASSET}, COINGECKO_IDS | cut -d, -f2)"

  # get stock exchange specific infos for trade (e.g. f_QUANTITY_LOT_CUT; f_MIN_NOTIONAL)
  $TOKEN_INFO_CMD $f_ASSET $f_CURRENCY $f_QUANTITY
  local f_QUANTITY=${f_QUANTITY_LOT_CUT}
  
  #### Workaround for f_QUANTITY_LOT_CUT by buy more and directly sell
  g_echo_note "Checking for need of QUANTITY_LOT_CUT Workaround (${f_QUANTITY_LOT_CUT} > ${f_MIN_NOTIONAL})"
  if [ $(echo "${f_QUANTITY_LOT_CUT} > ${f_MIN_NOTIONAL}" | bc -l) -eq 0 ] && [ ${f_ACTION} = sell ]
  then
    # add 0.5 to f_MIN_NOTIONAL and trading fee
    local f_MIN_NOTIONAL_WITH_FEE=$(echo "${f_MIN_NOTIONAL}+${FEE}+0.5" | bc -l)
    g_echo_note "Doing QUANTITY_LOT_CUT Workaround - buying ${f_MIN_NOTIONAL_WITH_FEE} ${f_ASSET} ${f_CURRENCY}"
    do_trade ${f_ASSET} ${f_CURRENCY} ${f_MIN_NOTIONAL_WITH_FEE} buy "Workaround for selling values under QUANTITY_LOT_CUT - buy +MIN_NOTIONAL" || return 1
    local f_QUANTITY=$(echo "${f_QUANTITY}+${f_MIN_NOTIONAL}" | bc -l)
  fi
   
  if [ "${f_ACTION}" = "buy" ]
  then
    # check for enough balance for trade
    get_balances
    local f_CURRENCY_BALANCE=$(egrep "^${f_CURRENCY}," EXCHANGE_GET_BALANCES_CMD_OUT | cut -d"," -f2)
    g_echo_note "Checking for enough balance for trade (${f_CURRENCY_BALANCE} > ${f_QUANTITY})"
    if [ $(echo "${f_CURRENCY_BALANCE} > ${f_QUANTITY}" | bc -l) -eq 0 ]
    then
      local f_note="Not enough balance for trade (${f_CURRENCY_BALANCE} > ${f_QUANTITY}) :${f_COMMENT} 
${FUNCNAME} $@"
      g_echo_note "$f_note"
      g_signal-notify "$f_note" 
      return 1
    fi
  fi

  # prepare trading command
  local f_CMDFILE="trade-histories/${f_DATE}-${f_CURRENCY}-${f_MIN_NOTIONAL}-TRADE_CMD"
  echo "${TRADE_CMD}" | perl -pe "s/ACTION/${f_ACTION}/; s/TOKEN/${f_ASSET}${f_CURRENCY}/; s/QUANTITY/${f_QUANTITY}/" >${f_CMDFILE}
  # trade
  g_echo_note "Command: $(cat ${f_CMDFILE})"
  #g_runcmd g_retrycmd sh ${f_CMDFILE} >${f_CMDFILE}_OUT
  . ${f_CMDFILE} 
  cat ${g_tmp}/API_CMD_OUT >${f_CMDFILE}_OUT
  g_echo_note "Command Output: $(cat ${f_CMDFILE}_OUT)" 

  # workaround for "insufficient balance" error. lower quantity in 0.1 steps and try again (for values loosing while selling)
  if [ "${f_ACTION}" = "sell" ] && grep -q "Account has insufficient balance for requested action." ${f_CMDFILE}_OUT
  then
    g_echo_note "workaround for \"insufficient balance\" error."
    local f_tries=10
    local f_try=1
    until (grep -q "FILLED" ${f_CMDFILE}_OUT)
    do
      sleep 1
      f_QUANTITY=$(echo "$f_QUANTITY-0.1" | bc -l | sed 's/^\./0./;')
      g_echo_note "lower $f_QUANTITY by -0.1"
      echo "${TRADE_CMD}" | perl -pe "s/ACTION/${f_ACTION}/; s/TOKEN/${f_ASSET}${f_CURRENCY}/; s/QUANTITY/${f_QUANTITY}/" >${f_CMDFILE}
      #g_runcmd g_retrycmd sh ${f_CMDFILE} >${f_CMDFILE}_OUT
      . ${f_CMDFILE} 
      cat ${g_tmp}/API_CMD_OUT >${f_CMDFILE}_OUT
      [ $f_try -eq $f_tries ] && break
      ((f_try=f_try+1))
    done
  fi


  # Check return and log trade
  f_STATUS=$(cat ${f_CMDFILE}_OUT | grep '^{' | jq -r .status)
  
  local f_trade_info_msg="TRADE - ${f_ACTION} ${f_ASSET}${f_CURRENCY}
${f_link}

Complete Overview: https://bot.ds9.dedyn.io/

Comment: ${f_COMMENT}"
  
  if [ "${f_STATUS}" = "FILLED" ] 
  then
    g_echo_note "TRADE SUCCESSFUL!"
    local f_PRICE=$(cat ${f_CMDFILE}_OUT | grep '^{' | jq -r .fills[].price | head -n1)
    local f_COMMISSION=$(cat ${f_CMDFILE}_OUT | grep '^{' | jq -r .fills[].commission) | head -n1 
    local f_COMMISSIONASSET=$(cat ${f_CMDFILE}_OUT | grep '^{' | jq -r .fills[].commissionAsset | head -n1)
    echo "${f_DATE},${f_ACTION},${f_CMDFILE}_OUT,${f_QUANTITY} ${f_CURRENCY},${f_PRICE},${f_COMMISSION} ${f_COMMISSIONASSET},${f_COMMENT}" | head -n1 >>trade-histories/${f_ASSET}${f_CURRENCY}.history.csv
    if [ "${f_ACTION}" = "buy" ]
    then
      if echo ${f_COMMENT} | grep -q "Workaround for selling values under QUANTITY_LOT_CUT"
      then
        echo "${f_DATE},${f_ACTION},${f_CMDFILE}_OUT,${f_QUANTITY} ${f_CURRENCY},${f_PRICE},${f_COMMISSION} ${f_COMMISSIONASSET},${f_COMMENT}" | head -n1 >>trade-histories/trade-*${f_ASSET}${f_CURRENCY}-open.history.csv
      else
        echo "${f_DATE},${f_ACTION},${f_CMDFILE}_OUT,${f_QUANTITY} ${f_CURRENCY},${f_PRICE},${f_COMMISSION} ${f_COMMISSIONASSET},${f_COMMENT}" | head -n1  >>trade-histories/trade-$(date  +%F.%T. | sed 's/:/_/g')${f_ASSET}${f_CURRENCY}-open.history.csv
      fi
    fi
    if [ "${f_ACTION}" = "sell" ]
    then
      f_tradehistfile="$(ls trade-histories/trade-*${f_ASSET}${f_CURRENCY}-open.history.csv | tail -n1)"
      echo "${f_DATE},${f_ACTION},${f_CMDFILE}_OUT,${f_QUANTITY} ${f_CURRENCY},${f_PRICE},${f_COMMISSION} ${f_COMMISSIONASSET},${f_COMMENT}" | head -n1 >>${f_tradehistfile}
      f_tradehistfileclosed=$(echo ${f_tradehistfile} | sed 's/open.history.csv/closed.history.csv/')
      mv ${f_tradehistfile} ${f_tradehistfileclosed}
    fi
    g_signal-notify "TRADE SUCCESSFUL!

${f_trade_info_msg}

Command stored: ${f_CMDFILE}[_OUT]"
    [ -f DIFF_BUY_PRICE_${f_ASSET}${f_CURRENCY} ] && [ "${f_ACTION}" = "sell" ] && rm -f DIFF_BUY_PRICE_${f_ASSET}${f_CURRENCY}
    # get new balances
    get_balances
  else
    g_echo_note "TRADE FAILED!
$(cat ${f_CMDFILE}_OUT)"
    g_signal-notify "TRADE FAILED!
${f_trade_info_msg}

Command ${f_CMDFILE}: 
$0 $@
$(cat ${f_CMDFILE})

OUTPUT:
$(cat ${f_CMDFILE}_OUT)
"
  fi
}