These are well-known indicators / features are required in my opinion:
1. XO chart in the form of updata type . Kagi Chart.
2. clone of fin-algo MP / MPL / Accum Delta / Range Select.
3. EV(effective volumes),CCI,Ergog CCI,wR%,div spotter,Search Volume Index,RSI(different versions of RSI).
4. Integration with diff language trading platforms/library.
5. LOM
6. making DLL (is highly required else KKS won't participate on coding)
7. Support for esig emul/esig plugin.additional option for TradeTiger,PIB,ODIN data extractor
8. Cumulative volme + PAS.
9. different Testing Simulations.
10. Foot - print chart.
11. Few quant based indicators. ( )
12. Option based indicator eg. PCR,wPCR,IV,option model based functions to calculate volatility etc.
13. Sentiment indicator.
14. clone of Acme packs + Acme VWAP
15. Bias from MP/VP
16. Importing Delivery Volume.Bulk deal data.Block deal data and scaners based on that.
17. integration with quandl / bond market data. this one is done i have sincere gratefulness to you for that
18. EW and WW;ABCD and Harmonic ; Flag and Pennut in Market analyzer / Scanner.
19. Effort index;Summation Index.Advanced Decline.
20. Super Trend. and Auto TL/TC