78 lines
2.6 KiB
Bash
78 lines
2.6 KiB
Bash
#!/bin/bash
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# Copyright (c) 2022-2024 olli
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#
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# This file is part of dabo (crypto bot).
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#
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# dabo is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# dabo is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with dabo. If not, see <http://www.gnu.org/licenses/>.
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function get_rsi_indicator {
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#g_echo_note "RUNNING FUNCTION ${FUNCNAME} $@"
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# get histfile
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local f_hist_file="$1"
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local f_last_minutes="$2"
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# calculate change of lastest f_last_minutes+1 prices for calculating rsi over the last f_last_minutes periods
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local f_price
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local f_last_price
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local f_positive_sum=0
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local f_negative_sum=0
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f_rsi=""
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local f_period=$((f_last_minutes+1))
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local f_period_sum=$(tail -n${f_period} "${f_hist_file}" | cut -d, -f2 | grep "^[0-9]" | wc -l)
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if ! [ ${f_period_sum} -ge ${f_period} ]
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then
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g_echo_note "${FUNCNAME} $@: Not enough data - waiting for more values and defaulting to 50. (${f_period} needed; ${f_period_sum} given)"
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echo -n ",50" >>"${f_hist_file}"
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return 0
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fi
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f_positive_sum=$(tail -n${f_period} "${f_hist_file}" | cut -d"," -f3 | grep "^[0-9]" | awk "{ SUM += \$1} END { printf(\"%10.10f\", SUM/${f_period}) }")
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f_negative_sum=$(tail -n${f_period} "${f_hist_file}" | cut -d"," -f3 | grep "^-[0-9]" | awk "{ SUM += \$1} END { printf(\"%10.10f\", SUM/${f_period}) }")
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# if one of both is "0" then fix results
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if [ ${f_negative_sum} == "0.0000000000" ]
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then
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f_rsi=100
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#g_echo_note "RSI-Indicator RSI: ${f_rsi}%"
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echo -n ",${f_rsi}" >>"${f_hist_file}"
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return 0
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fi
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if [ ${f_positive_sum} == "0.0000000000" ]
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then
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f_rsi=0
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#g_echo_note "RSI-Indicator RSI: ${f_rsi}%"
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echo -n ",${f_rsi}" >>"${f_hist_file}"
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return 0
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fi
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# calculate positive/negative change averages
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local f_negative_sum_average=$(echo "${f_negative_sum}/${f_last_minutes}" | bc -l | sed 's/-//')
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local f_positive_sum_average=$(echo "${f_positive_sum}/${f_last_minutes}" | bc -l)
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# calculate RS and RSI
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local f_rs=$(echo "${f_positive_sum_average}/${f_negative_sum_average}" | bc -l)
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f_rsi=$(echo "100-(100/(1+${f_rs}))" | bc -l | xargs printf "%.0f")
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echo -n ",${f_rsi}" >>"${f_hist_file}"
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#g_echo_note "RSI-Indicator RSI: ${f_rsi}%"
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}
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