You should not have a fixed pip amount of stoploss if you want to be a divergence trader. Different H4 charts will need different stoplosses. The best entry is usually as soon as the divergence is formed, but you might come up with a own strategy for your entry.
And you do definitly need to learn more, as you titeled your post as hidden divergence, and the immage shows a regular bearish divergence. See Regular Divergence for more help.