Buy after the second lowest low, sell at second highest high

Avg share Price by month of a fictitious stock index

$61
$65
$57
$51
$43
$34
$36
$43
$38
$42- buy here!
$37
$41
$46
$55
$71
$78
$68
$79
$72
$67
$81
$88
$79
$92
$84
$79
$89
$97
$107
$104
$117
$124
$131
$126
$114
$129
$144
$133
$119
$128
$148
$155
$143
$147
$146 - Sell here!
$144
$151
$138


Buy after the second lowest low, sell at second highest high