To use selector to search into your bash history, you can use
-.B selector -q -b -i -d -v -w -l 10000 <(history)
+.B selector -q -b -i -d -v -w -l ${HISTSIZE} <(history)
.SH "KEY-BINDING IN BASH"
associate it to M-r (that is, the "Alt" and "r" key pressed together),
just add something like
-bind '"\\C-[r":"\\C-a\\C-kselector -q -b -i -d -v -w -l 10000 <(history)\\C-m"'
+bind '"\\C-[r":"\\C-a\\C-kselector -q -b -i -d -v -w -l ${HISTSIZE} <(history)\\C-m"'
in your ~/.bashrc.