This script is a mixture of my two previous scripts "True Strong Classical Support/Resistance Levels" and "Hidden Supports & Resistances + Round Levels". This combination brings on better identification of the most efficient support/resistance levels.
Note that "Hidden SnR Levels" part of the code is only expected to work on Forex charts, but apart from that, the...
If you search the internet, you won't find much about these types of resistance and support levels. Hidden levels are SnR levels calculated based on some psychological patterns and sometimes it's unbelievable that the chart responds to these levels.
So use the indicator and check the idea.