If i want to check certain condition(for e. G. If close>100 EMA) on set of stock(say on 10 stocks) can i do that?

Algos, strategies, code
2

Yes you can run this as a script - this should give you an idea - https://zerodha.com/expert-advisors/code/3-15-crossover

3

If you plan to use Amibroker, it has option where you can add required symbols into the watchlist.

Run scan with the filtered symbol list/Watch list using below AFL

_SECTION_BEGIN("NEOTRADE");
Plot( C, "Close", ParamColor("Color", colorDefault ), styleNoTitle | ParamStyle("Style") | GetPriceStyle() ); 
x = EMA(Close,100);

Buy = Ref(Close,-1) > x;
Sell = Ref(Close,-1) < x;

Buy = ExRem(Buy,Sell);
Sell = ExRem(Sell,Buy);

PlotShapes(IIf(Buy, shapeUpArrow, shapeNone),colorGreen, 0,L); 
        
PlotShapes(IIf(Sell, shapeDownArrow, shapeNone),colorRed, 0,H);

_SECTION_END();

.

Regards

Vivith

www.neotradeanalytics.com

(Authorized vendor of NSE supporting realtime data feeds to Amibroker, Ninjatrader and Metastock)