No idea from my actual point of view
Horizontal resistance are relatively easy to detect as long as hey have not been crossed (i.e. I mean that they are being crossed with the actual candle) and despite the limit of history, with MTF I have developed a method that detects them during 200 weeks or slightly more on a daily chart. Interesting result, because I could integrate this detection in a screemer.
Oblique trendlines are much more complicated and until now, all my attempts failed. Any hint or suggestion will be highly appreciated.
Good trades and simulations to all.