function check_buy_conditions {

  local f_ASSET_HIST_FILE="$1"
  f_ASSET=$(basename ${f_ASSET_HIST_FILE} | cut -d\. -f1)

  if ! [ "$2" == "SELL" ]
  then
    if [ -n "${BOT}" ]
    then
      # ignore already invested asset 
      if ls trade-histories/trade-*${f_ASSET}-open.history.csv >/dev/null 2>&1
      then
        g_echo_note "BUY ${f_ASSET}@${CURRENCY}: $f_ASSET Already invested - ignoring for more diversification"
        return 0
      fi
    fi
  fi
  
  # get asset vars
  get_vars_from_csv "${f_ASSET_HIST_FILE}" || return 1 
  
  ### from here: check for defined state to buy
  f_BUY=""

  # run strategies
  local f_strategy_path=../../strategies
  [ -z "${BOT}" ] && f_strategy_path=strategies
  for f_strategy in $(find ${f_strategy_path} -name "buy.*.conf" -type f)
  do
    f_echo_prefix="BUY ${f_ASSET}@${CURRENCY}:${f_price}:${f_strategy} - "
    if check_buy_conditions_strategy ${f_ASSET_HIST_FILE} ${f_strategy} 
    then 
      f_BUY="${f_echo_prefix} All BUY conditions met!!!
${f_last_line},${f_market_performance}"
      break
    fi
  done

  # if this checks came from sell function
  if [ "$2" == "SELL" ]
  then
    [ -n "$f_BUY" ] && return 1
    return 0
  fi

  ### Buy or not buy?
  # BOT
  if [ -n "$f_BUY" ] && [ -n "${BOT}" ]
  then
    echo "${f_last_line},${f_ASSET}" >>trade.log

    f_BUY="${f_echo_prefix}All BUY conditions met!!!
${f_BUY}"
    g_echo_note "${f_BUY}"

    # calculate quantity from balance for potentially invest
    local f_INVEST_QUANTITY=$(echo "scale=2; ${CURRENCY_BALANCE}/100*${INVEST}" | bc -l | sed 's/^\./0./;' | cut -d\. -f1)
    g_echo_note "BUY current investment quantity is ${f_INVEST_QUANTITY} ${CURRENCY}"

    # remove CURRENCY from asset
    f_ASSET=$(echo ${f_ASSET} | sed "s/${CURRENCY}//")

    if [ ${STOCK_EXCHANGE} = "BINANCE" ]
    then
      # get stock exchange specific infos for trade (e.g. MIN_NOTIONAL)
      ${TOKEN_INFO_CMD} ${f_ASSET} ${CURRENCY}

      # use MIN_NOTIONAL+5% as INVEST_QUANTITY if INVEST_QUANTITY is under MIN_NOTIONAL
      # +5% in spite of MIN_NOTIONAL to be able to sell when the price falls a little bit
      [ $(echo "${f_INVEST_QUANTITY} < ${f_MIN_NOTIONAL}" | bc -l) -eq 0 ] || f_INVEST_QUANTITY=$(echo "scale=2; $f_MIN_NOTIONAL/100*105" | bc -l)

      # if there is not enough balance for buying because ${f_MIN_NOTIONAL} needed for buying to sell (workaround)
      if [ $(echo "${CURRENCY_BALANCE} < ${f_MIN_NOTIONAL}*2" | bc -l) -ne 0 ]
      then
        g_echo_note "BUY ${f_ASSET} not enough balance ${CURRENCY_BALANCE} for buying because of MIN_NOTIONAL (${f_MIN_NOTIONAL}*2) needed for buying-to-sell (workaround)"
        return 1
      fi

      # continue if not balance enough for lowest quantity (MIN_NOTIONAL)
      if [ $(echo "${CURRENCY_BALANCE} > ${f_INVEST_QUANTITY}" | bc -l) -eq 0 ]
      then
        g_echo_note "BUY ${f_ASSET} not enough balance (${CURRENCY_BALANCE}) for lowest quantity (MIN_NOTIONAL - ${f_INVEST_QUANTITY})"
        return 1
      fi

      binance_convert ${f_ASSET} ${CURRENCY} ${f_INVEST_QUANTITY} buy "$f_BUY" || \
      do_trade ${f_ASSET} ${CURRENCY} ${f_INVEST_QUANTITY} buy "$f_BUY"
    else
      do_trade ${f_ASSET} ${CURRENCY} ${f_INVEST_QUANTITY} buy "$f_BUY"
    fi
    f_BUY=""
  fi

  # ANALYZE
  if [ -n "$f_BUY" ] && [ -z "${BOT}" ]
  then
    echo "BUY: ${f_echo_prefix} All BUY conditions met!!!"
echo "${csv_headline}
${f_BUY}" |  perl -pe 's/((?<=,)|(?<=^)),/ ,/g;' | column -t -s,
    echo "$f_BUY" >${g_tmp}/open-${tmpfile}
    BUY_PRICE=$current
    f_BUY=""
  fi



}


function check_buy_conditions_strategy {


  # load strategy
  local f_echo_prefix="BUY ${f_ASSET}@${CURRENCY}:${f_price}:${f_strategy} - "
  if [ -s "${f_strategy}" ]
  then
    . "${f_strategy}" || return 1
  else
    g_echo_note "${f_echo_prefix}Strategy file not found"
    return 1
  fi
  [ -n "${BOT}" ] && g_echo_note "${f_echo_prefix}Running BUY checks"


  # Check market-performance
  if [ $(echo "${f_market_performance} > ${GOOD_MARKET_PERFORMANCE_INDEX}" | bc -l) -eq 0 ]
  then
    g_echo_note "${f_echo_prefix}BUY market performance ${f_market_performance}% looks bad - Dont buy anything"
    return 1
  fi

  local f_priceXago=$(tail -n${BUY_MINGROWTH_PERIOD} ${f_ASSET_HIST_FILE} | grep ^[0-9] | head -n1 | cut -d, -f2)
  local f_pricenow=$(echo ${f_last_line} | grep ^[0-9] | cut -d, -f2)
  local f_pricediff=$(g_percentage-diff "$f_priceXago" "$f_pricenow")
  if [ $(echo "${f_pricediff} < ${BUY_MINGROWTH}" | bc -l) -ne 0 ]
  then
    g_echo_note "${f_echo_prefix}With ${f_pricediff} under ${BUY_MINGROWTH}% growth in the last ${BUY_MINGROWTH_PERIOD} time periods"
    return 1
  fi

  # Check MACD
  if [ $(echo "${f_macd_histogram_relation} < ${BUY_MACD_RELATION_FROM}" | bc -l) -ne 0 ]
  then
    g_echo_note "${f_echo_prefix}MACD Relation with ${f_macd_histogram_relation}% under BUY_MACD_RELATION_FROM ${BUY_MACD_RELATION_FROM}%"
    return 1
  fi
  if [ $(echo "${f_macd_histogram_relation} > ${BUY_MACD_RELATION_TO}" | bc -l) -ne 0 ]
  then
    g_echo_note "${f_echo_prefix}MACD Relation with ${f_macd_histogram_relation}% over BUY_MACD_RELATION_TO ${BUY_MACD_RELATION_TO}%"
    return 1
  fi

  ## no negative or empty values
  #if echo "${f_macd_histogram_relation}" | grep -q "^[0-9]" 
  #then
  #  # check for conditions
  #  if [ ${f_macd_histogram_relation} -le ${BUY_MACD_RELATION_FROM} ] || [ ${f_macd_histogram_relation} -ge ${BUY_MACD_RELATION_TO} ]
  #  then
  #    g_echo_note "${f_echo_prefix}MACD conditions NOT met"
  #    return 1
  #  fi
  #else
  #  g_echo_note "${f_echo_prefix}f_macd_histogram_relation empty or negative"
  #  return 1
  #fi

  # RSI
  if \
   [ ${f_rsi5} -le ${BUY_RSI5_SIGNAL_UNTIL} ] && \
   [ ${f_rsi14} -le ${BUY_RSI14_SIGNAL_UNTIL} ] && \
   [ ${f_rsi21} -le ${BUY_RSI21_SIGNAL_UNTIL} ] && \
   [ ${f_rsi60} -le ${BUY_RSI60_SIGNAL_UNTIL} ] && \
   [ ${f_rsi120} -le ${BUY_RSI120_SIGNAL_UNTIL} ] && \
   [ ${f_rsi240} -le ${BUY_RSI240_SIGNAL_UNTIL} ] && \
   [ ${f_rsi420} -le ${BUY_RSI420_SIGNAL_UNTIL} ] && \
   [ ${f_rsi720} -le ${BUY_RSI720_SIGNAL_UNTIL} ] && \
   [ ${f_rsi5} -ge ${BUY_RSI5_SIGNAL_FROM} ] && \
   [ ${f_rsi14} -ge ${BUY_RSI14_SIGNAL_FROM} ] && \
   [ ${f_rsi21} -ge ${BUY_RSI21_SIGNAL_FROM} ] && \
   [ ${f_rsi60} -ge ${BUY_RSI60_SIGNAL_FROM} ] && \
   [ ${f_rsi120} -ge ${BUY_RSI120_SIGNAL_FROM} ] && \
   [ ${f_rsi240} -ge ${BUY_RSI240_SIGNAL_FROM} ] && \
   [ ${f_rsi420} -ge ${BUY_RSI420_SIGNAL_FROM} ] && \
   [ ${f_rsi720} -ge ${BUY_RSI720_SIGNAL_FROM} ]
  then
    echo "${f_echo_prefix}RSI conditions met" >/dev/null
  else
    g_echo_note "${f_echo_prefix}RSI conditions NOT met"
    return 1
  fi

  # Price change
  if \
   [ $(echo "${f_price_change_1_day} > ${BUY_MIN_PRICE_CHANGE_LAST_1_DAY}" | bc -l) -ne 0 ] && \
   [ $(echo "${f_price_change_7_day} > ${BUY_MIN_PRICE_CHANGE_LAST_7_DAY}" | bc -l) -ne 0 ] && \
   [ $(echo "${f_price_change_14_day} > ${BUY_MIN_PRICE_CHANGE_LAST_14_DAY}" | bc -l) -ne 0 ] && \
   [ $(echo "${f_price_change_30_day} > ${BUY_MIN_PRICE_CHANGE_LAST_30_DAY}" | bc -l) -ne 0 ]
  then
    echo "${f_echo_prefix}Price change conditions met" >/dev/null
  else
    g_echo_note "${f_echo_prefix}Price change conditions NOT met"
    return 1
  fi

#  if [ -n "$f_BUY" ]
#  then
#    # Check for beginning MACD Trend
#    if ! tail -n3 ${f_ASSET_HIST_FILE} | grep -q '|buy,'
#    then
#      g_echo_note "${f_echo_prefix}MACD Trend not near (3 timeframes) the beginning buy signal"
#      return 1
#    fi

#    # Check for continious growing price
#    local f_price_before=$(tail -n2 ${f_ASSET_HIST_FILE} | head -n1 | cut -d, -f2)
#    local f_price_2before=$(tail -n3 ${f_ASSET_HIST_FILE} | head -n1 | cut -d, -f2)
#    local f_price_3before=$(tail -n4 ${f_ASSET_HIST_FILE} | head -n1 | cut -d, -f2)
#    if [ $(echo "${f_price} < ${f_price_before}" | bc -l) -ne 0 ] || \
#      [ $(echo "${f_price_before} < ${f_price_2before}" | bc -l) -ne 0 ] || \
#      [ $(echo "${f_price_2before} < ${f_price_3before}" | bc -l) -ne 0 ]
#    then
#      g_echo_note "${f_echo_prefix}Last 3 prices not continiously growing"
#      return 1
#    fi



#    # Check for growing MACD trend
#    local f_macd_histogram_before=$(tail -n2 ${f_ASSET_HIST_FILE} | head -n1 | cut -d, -f8)
#    local f_macd_histogram_2before=$(tail -n3 ${f_ASSET_HIST_FILE} | head -n1 | cut -d, -f8)
#    local f_macd_histogram_3before=$(tail -n4 ${f_ASSET_HIST_FILE} | head -n1 | cut -d, -f8)
#    local f_macd_histogram_4before=$(tail -n5 ${f_ASSET_HIST_FILE} | head -n1 | cut -d, -f8)
#    local f_macd_histogram_5before=$(tail -n6 ${f_ASSET_HIST_FILE} | head -n1 | cut -d, -f8)
#    if \
#     [ $(echo "${f_macd_histogram} < ${f_macd_histogram_before}" | bc -l) -ne 0 ] && \
#     [ $(echo "${f_macd_histogram_before} < ${f_macd_histogram_2before}" | bc -l) -ne 0 ] && \
#     [ $(echo "${f_macd_histogram_2before} < ${f_macd_histogram_3before}" | bc -l) -ne 0 ] && \
#     [ $(echo "${f_macd_histogram_3before} < ${f_macd_histogram_4before}" | bc -l) -ne 0 ] && \
#     [ $(echo "${f_macd_histogram_4before} < ${f_macd_histogram_5before}" | bc -l) -ne 0 ]
#    then
#      g_echo_note "BUY ${f_ASSET}@${CURRENCY}:${f_price} MACD Histogram not rising (now ${f_macd_histogram} < 1 before ${f_macd_histogram_before} < 2 before ${f_macd_histogram_2before} < 3 before ${f_macd_histogram_3before} < 4 before ${f_macd_histogram_4before} < 5 before ${f_macd_histogram_5before}) - trend loses strength / not growing - don't buy"
#      return 1
#    fi
#  fi

}