I know what you mean by Client sentiment as DailyFX used to be run by one of my brokers FXCM.
IG took it over last year I think.
I actually tried that idea a few years ago with DailyFX's info, I believe you do the opposite of what the traders are doing or something like that. I did get results but nothing better than anything else.
I actually believe a EMA / SMA of 10 - 50 - 200 gives you that sentiment of where the market is pushing the price too.
I actually use SMA 72 ( changed from a EMA recently ) on the M5 chart to determine the market Bias / sentiment.
On H4 and the Day Chart, I use 63 SMA to determine the market Bias / sentiment.