I was going to give a reference to yahoo finances charting but I think bigcharts is better for longer time frames. Anyway, forgot to remove the .PK and .PK is what yahoo add I guess to note US Pink OTC Markets Inc stocks.
Googling DYSOF.PK shows it or the link use the below.
http://finance.yahoo.com/echarts?s=DYSOF.PK#chart7:symbol=dysof.pk;range=1m;indicator=volume;charttype=ohlc;crosshair=on;ohlcvalues=1;logscale=off;source=undefined.
I just googled so might as well add some other links for DYSOF.
http://investing.businessweek.com/research/stocks/snapshot/snapshot.asp?ticker=DYSOF:US
http://www.marketwatch.com/investing/stock/DYSOF/charts
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