diff --git a/scripts/crontab.bithumb.example b/scripts/crontab.bithumb.example
index d792228..29654de 100644
--- a/scripts/crontab.bithumb.example
+++ b/scripts/crontab.bithumb.example
@@ -1,17 +1,23 @@
 # Bithumb vol_breakout 운영 cron (install_crontab.sh 로 등록)
 # 프로젝트: /Users/dsyoon/workspace/bithumb
 # Python: BITHUMB_PYTHON 또는 coin/ncue conda (scripts/_cron_env.sh)
+#
+# 활성화: 아래 cron 줄 맨 앞 # 제거 후
+#   bash scripts/install_crontab.sh --apply
+# 비활성화(주석): bash scripts/install_crontab.sh --disable
+# 제거: bash scripts/install_crontab.sh --remove
 
 # 캔들 증분 (TRX,NEAR,WLD × DOWNLOAD_INTERVALS) — 매 1분
-* * * * * /Users/dsyoon/workspace/bithumb/scripts/00_run_download_cron.sh >> /Users/dsyoon/workspace/bithumb/data/common/download_cron.log 2>&1
+# * * * * * /Users/dsyoon/workspace/bithumb/scripts/00_run_download_cron.sh >> /Users/dsyoon/workspace/bithumb/data/common/download_cron.log 2>&1
 
 # vol_breakout 15m flip tick — 매 1분
-* * * * * /Users/dsyoon/workspace/bithumb/scripts/3_run_vol_breakout_cron.sh >> /Users/dsyoon/workspace/bithumb/data/spot/operations/vol_breakout_cron.log 2>&1
+# * * * * * /Users/dsyoon/workspace/bithumb/scripts/3_run_vol_breakout_cron.sh >> /Users/dsyoon/workspace/bithumb/data/spot/operations/vol_breakout_cron.log 2>&1
 
 # vol_live 모니터 JSON/HTML 백업 갱신 — 5분마다
-*/5 * * * * /Users/dsyoon/workspace/bithumb/scripts/3_run_vol_monitor_cron.sh >> /Users/dsyoon/workspace/bithumb/data/spot/operations/vol_monitor_cron.log 2>&1
+# */5 * * * * /Users/dsyoon/workspace/bithumb/scripts/3_run_vol_monitor_cron.sh >> /Users/dsyoon/workspace/bithumb/data/spot/operations/vol_monitor_cron.log 2>&1
 
-# 모니터 HTTP 서버(8766) — 터미널: python scripts/3_run_vol_monitor.py
+# vol_live 모니터 HTTP 서버(8766) — 2분마다 미기동 시 nohup 기동
+# */2 * * * * /Users/dsyoon/workspace/bithumb/scripts/3_ensure_vol_monitor_serve.sh >> /Users/dsyoon/workspace/bithumb/data/spot/operations/vol_monitor_serve.log 2>&1
 
 # (선택) fractal 운영 감시 — vol 전용이면 주석 유지
 # */5 * * * * /Users/dsyoon/workspace/bithumb/scripts/3_run_watch_cron.sh >> /Users/dsyoon/workspace/bithumb/data/spot/operations/watch_cron.log 2>&1
diff --git a/scripts/install_crontab.sh b/scripts/install_crontab.sh
index 93993c9..4518b36 100755
--- a/scripts/install_crontab.sh
+++ b/scripts/install_crontab.sh
@@ -1,18 +1,23 @@
 #!/usr/bin/env bash
-# Bithumb cron 등록 — 기존 crontab에 BITHUMB 블록 병합/갱신
+# Bithumb cron 등록 — 기존 crontab에 BITHUMB 블록 병합/갱신/비활성화
 set -euo pipefail
 
 ROOT="$(cd "$(dirname "$0")/.." && pwd)"
 MARKER_BEGIN="# BITHUMB vol_breakout cron (begin)"
 MARKER_END="# BITHUMB vol_breakout cron (end)"
+MARKER_BEGIN_ALT="# BITHUMB (begin)"
+MARKER_END_ALT="# BITHUMB (end)"
 EXAMPLE="${ROOT}/scripts/crontab.bithumb.example"
+BITHUMB_CRON_RE='bithumb/scripts/(00_run_download_cron|3_run_vol_breakout_cron|3_run_vol_monitor_cron|3_ensure_vol_monitor_serve|3_run_watch_cron)\.sh'
 
 usage() {
   cat <<EOF
-Usage: $(basename "$0") [--apply|--show|--remove]
+Usage: $(basename "$0") [--show|--apply|--disable|--enable|--remove]
 
   --show     등록될 cron 블록만 출력 (기본)
-  --apply    crontab에 BITHUMB 블록 병합 후 설치
+  --apply    crontab에 BITHUMB 블록 병합 후 설치 (example 주석=비활성)
+  --disable  crontab BITHUMB 블록 내 실행 줄을 # 주석 처리
+  --enable   crontab BITHUMB 블록 내 cron 줄 주석 해제
   --remove   crontab에서 BITHUMB 블록 제거
 
 환경 변수:
@@ -22,6 +27,7 @@ Usage: $(basename "$0") [--apply|--show|--remove]
   data/common/download_cron.log
   data/spot/operations/vol_breakout_cron.log
   data/spot/operations/vol_monitor_cron.log
+  data/spot/operations/vol_monitor_serve.log
 EOF
 }
 
@@ -29,18 +35,45 @@ render_block() {
   {
     echo "$MARKER_BEGIN"
     sed "s|/Users/dsyoon/workspace/bithumb|${ROOT}|g" "$EXAMPLE" \
-      | grep -v '^#' | grep -v '^[[:space:]]*$'
+      | grep -v '^[[:space:]]*$'
     echo "$MARKER_END"
   }
 }
 
 strip_block() {
-  awk -v b="$MARKER_BEGIN" -v e="$MARKER_END" '
-    $0 == b { skip=1; next }
-    $0 == e { skip=0; next }
+  awk -v re="${BITHUMB_CRON_RE}" '
+    $0 == "# BITHUMB vol_breakout cron (begin)" { skip=1; next }
+    $0 == "# BITHUMB vol_breakout cron (end)" { skip=0; next }
+    $0 == "# BITHUMB (begin)" { skip=1; next }
+    $0 == "# BITHUMB (end)" { skip=0; next }
     skip { next }
-    /^# BITHUMB/ { next }
-    /bithumb\/scripts\/(00_run_download_cron|3_run_vol_breakout_cron|3_run_vol_monitor_cron|3_run_watch_cron)\.sh/ { next }
+    $0 ~ re { next }
+    { print }
+  '
+}
+
+toggle_block() {
+  local mode="$1"
+  awk -v mode="$mode" -v re="${BITHUMB_CRON_RE}" '
+    $0 == "# BITHUMB vol_breakout cron (begin)" || $0 == "# BITHUMB (begin)" {
+      in_b=1
+      print
+      next
+    }
+    $0 == "# BITHUMB vol_breakout cron (end)" || $0 == "# BITHUMB (end)" {
+      in_b=0
+      print
+      next
+    }
+    in_b && mode == "disable" && $0 !~ /^#/ && $0 ~ re {
+      print "# " $0
+      next
+    }
+    in_b && mode == "enable" && $0 ~ /^# / && $0 ~ re {
+      sub(/^# /, "")
+      print
+      next
+    }
     { print }
   '
 }
@@ -68,6 +101,28 @@ case "$ACTION" in
     rm -f "$tmp"
     echo "crontab installed. 확인: crontab -l"
     ;;
+  --disable)
+    tmp="$(mktemp)"
+    if crontab -l 2>/dev/null | toggle_block disable > "$tmp"; then
+      crontab "$tmp"
+      echo "BITHUMB cron 비활성화(주석 처리) 완료."
+    else
+      echo "crontab empty or not found." >&2
+      exit 1
+    fi
+    rm -f "$tmp"
+    ;;
+  --enable)
+    tmp="$(mktemp)"
+    if crontab -l 2>/dev/null | toggle_block enable > "$tmp"; then
+      crontab "$tmp"
+      echo "BITHUMB cron 활성화(주석 해제) 완료."
+    else
+      echo "crontab empty or not found." >&2
+      exit 1
+    fi
+    rm -f "$tmp"
+    ;;
   --remove)
     tmp="$(mktemp)"
     if crontab -l 2>/dev/null | strip_block > "$tmp"; then