-- Id: 2046 -- More information about this indicator can be found at: -- http://fxcodebase.com/code/viewtopic.php?f=17&t=20 --+------------------------------------------------------------------+ --| Copyright © 2018, Gehtsoft USA LLC | --| http://fxcodebase.com | --+------------------------------------------------------------------+ --| Developed by : Mario Jemic | --| mario.jemic@gmail.com | --+------------------------------------------------------------------+ --| Support our efforts by donating | --| Paypal: https://goo.gl/9Rj74e | --+------------------------------------------------------------------+ --| Patreon : https://goo.gl/GdXWeN | --| BitCoin : 15VCJTLaz12Amr7adHSBtL9v8XomURo9RF | --| BitCoin Cash: 1BEtS465S3Su438Kc58h2sqvVvHK9Mijtg | --| Ethereum : 0x8C110cD61538fb6d7A2B47858F0c0AaBd663068D | --| LiteCoin : LLU8PSY2vsq7B9kRELLZQcKf5nJQrdeqwD | --+------------------------------------------------------------------+ function Init() indicator:name("Bigger timeframe DNC"); indicator:description(""); indicator:requiredSource(core.Bar); indicator:type(core.Indicator); indicator.parameters:addGroup("Calculation"); indicator.parameters:addString("BS", "Time frame to calculate DNC", "", "D1"); indicator.parameters:setFlag("BS", core.FLAG_PERIODS); indicator.parameters:addInteger("N", "Number of periods", "", 20, 2, 10000); indicator.parameters:addString("AC", "Analyze the current period", "", "yes"); indicator.parameters:addStringAlternative("AC", "no", "", "no"); indicator.parameters:addStringAlternative("AC", "yes", "", "yes"); indicator.parameters:addString("SM", "Show middle line", "", "no"); indicator.parameters:addStringAlternative("SM", "no", "", "no"); indicator.parameters:addStringAlternative("SM", "yes", "", "yes"); indicator.parameters:addGroup("Display"); indicator.parameters:addColor("clrDU", "Color of the Up line", "", core.rgb(255, 255, 0)); indicator.parameters:addColor("clrDN", "Color of the Down line", "", core.rgb(255, 255, 0)); indicator.parameters:addColor("clrDM", "Color of the middle line", "", core.rgb(255, 255, 0)); end local source; -- the source local bf_data = nil; -- the high/low data local N; local BS; local bf_length; -- length of the bigger frame in seconds local dates; -- candle dates local host; local day_offset; local week_offset; local extent; local dn=nil; local du=nil; local dm=nil; function Prepare(nameOnly) source = instance.source; host = core.host; day_offset = host:execute("getTradingDayOffset"); week_offset = host:execute("getTradingWeekOffset"); BS = instance.parameters.BS; N = instance.parameters.N; extent = N*2; local name = profile:id() .. "(" .. source:name() .. "," .. BS .. "," .. N .. ")"; instance:name(name); if (nameOnly) then return; end local s, e, s1, e1; s, e = core.getcandle(source:barSize(), core.now(), 0, 0); s1, e1 = core.getcandle(BS, core.now(), 0, 0); assert ((e - s) <= (e1 - s1), "The chosen time frame must be bigger than the chart time frame!"); bf_length = math.floor((e1 - s1) * 86400 + 0.5); dn = instance:addStream("DU", core.Line, name .. ".DU", "DU", instance.parameters.clrDU, 0); du = instance:addStream("DN", core.Line, name .. ".DN", "DN", instance.parameters.clrDN, 0); if (instance.parameters.SM=="yes") then dm = instance:addStream("DM", core.Line, name .. ".DM", "DM", instance.parameters.clrDM, 0); end end local loading = false; local loadingFrom, loadingTo; local pday = nil; -- the function which is called to calculate the period function Update(period, mode) -- get date and time of the hi/lo candle in the reference data local bf_candle; bf_candle = core.getcandle(BS, source:date(period), day_offset, week_offset); -- if data for the specific candle are still loading -- then do nothing if loading and bf_candle >= loadingFrom and (loadingTo == 0 or bf_candle <= loadingTo) then return ; end -- if the period is before the source start -- the do nothing if period < source:first() then return ; end -- if data is not loaded yet at all -- load the data if bf_data == nil then -- there is no data at all, load initial data local to, t; local from; if (source:isAlive()) then -- if the source is subscribed for updates -- then subscribe the current collection as well to = 0; else -- else load up to the last currently available date t, to = core.getcandle(BS, source:date(period), day_offset, week_offset); end from = core.getcandle(BS, source:date(source:first()), day_offset, week_offset); dn:setBookmark(1, period); -- shift so the bigger frame data is able to provide us with the stoch data at the first period from = math.floor(from * 86400 - (bf_length * extent) + 0.5) / 86400; local nontrading, nontradingend; nontrading, nontradingend = core.isnontrading(from, day_offset); if nontrading then -- if it is non-trading, shift for two days to skip the non-trading periods from = math.floor((from - 2) * 86400 - (bf_length * extent) + 0.5) / 86400; end loading = true; loadingFrom = from; loadingTo = to; bf_data = host:execute("getHistory", 1, source:instrument(), BS, loadingFrom, to, source:isBid()); assert(core.indicators:findIndicator("DNC") ~= nil, "DNC" .. " indicator must be installed"); DNC = core.indicators:create("DNC", bf_data, instance.parameters.N,instance.parameters.AC,instance.parameters.clrDU,instance.parameters.clrDU,instance.parameters.clrDU,instance.parameters.SM); return ; end -- check whether the requested candle is before -- the reference collection start if (bf_candle < bf_data:date(0)) then dn:setBookmark(1, period); if loading then return ; end -- shift so the bigger frame data is able to provide us with the stoch data at the first period from = math.floor(bf_candle * 86400 - (bf_length * extent) + 0.5) / 86400; local nontrading, nontradingend; nontrading, nontradingend = core.isnontrading(from, day_offset); if nontrading then -- if it is non-trading, shift for two days to skip the non-trading periods from = math.floor((from - 2) * 86400 - (bf_length * extent) + 0.5) / 86400; end loading = true; loadingFrom = from; loadingTo = bf_data:date(0); host:execute("extendHistory", 1, bf_data, loadingFrom, loadingTo); return ; end -- check whether the requested candle is after -- the reference collection end if (not(source:isAlive()) and bf_candle > bf_data:date(bf_data:size() - 1)) then dn:setBookmark(1, period); if loading then return ; end loading = true; loadingFrom = bf_data:date(bf_data:size() - 1); loadingTo = bf_candle; host:execute("extendHistory", 1, bf_data, loadingFrom, loadingTo); return ; end DNC:update(mode); local p; p = findDateFast(bf_data, bf_candle, true); if p == -1 then return ; end if DNC:getStream(0):hasData(p) then dn[period] = DNC:getStream(0)[p]; end if DNC:getStream(1):hasData(p) then du[period] = DNC:getStream(1)[p]; end if (instance.parameters.SM=="yes") then if DNC:getStream(2):hasData(p) then dm[period] = DNC:getStream(2)[p]; end end end -- the function is called when the async operation is finished function AsyncOperationFinished(cookie) local period; pday = nil; period = dn:getBookmark(1); if (period < 0) then period = 0; end loading = false; instance:updateFrom(period); end function findDateFast(stream, date, precise) local datesec = nil; local periodsec = nil; local min, max, mid; datesec = math.floor(date * 86400 + 0.5) min = 0; max = stream:size() - 1; while true do mid = math.floor((min + max) / 2); periodsec = math.floor(stream:date(mid) * 86400 + 0.5); if datesec == periodsec then return mid; elseif datesec > periodsec then min = mid + 1; else max = mid - 1; end if min > max then if precise then return -1; else return min - 1; end end end end