Poloniex is not working for me. I also know what the problem is:

INFO      @1514735556976 12/31 10:52:36 am [poloniex] : [Method:returnBalances (params: ) ] error in DefaultMarketInterface::httpPOST: network error: [code: 299]: UnknownContent (an unknown error related to the remote content was detected) (try 11 of 20), message received: {"error":"Nonce must be greater than 3612014235991821. You provided 1245768852."}

It's simple to fix: just offset the nonce to make sure that it's above the minimum required by the API (but make sure you don't overflow whatever type you store it in.)

Not 100% sure if this is the place for fixes/feature requests... Is there a dedicated forum somewhere else?  In any case, for some reason, every time I change the candlestick time period, the market depth graph on the right keeps hiding. It's pretty annoying.

As to the features, I think some basic annotations on the graph would be great. Say a possibility to put a horizontal "ray" on the graph and specify the color and opacity (in manual mode, without displaying the strategy.)  Plus maybe some basic "spot" markers - like arrows, triangles, etc. My main problem right now is not seeing my last buy/sell price if the little triangular indicator is outside of the time range.  The strategy visualization can already display such arrows pointing to the right onto the price axis, so maybe this could be also adapted for the manual marks?

Some additional info: I am running on Win 10.  Cannot run on Debian Stretch due to the SSL library version problem.

This is what I see with the latest leonArdo running on Windows 10: https://i.imgur.com/iKXiF1u.png

Aren't those already there? I see them on Bitfinex right now (in the manual mode)...