-- Id: 1286 -- Indicator profile initialization routine -- Defines indicator profile properties and indicator parameters function Init() indicator:name("Stochastic Divergence"); indicator:description(""); indicator:requiredSource(core.Bar); indicator:type(core.Oscillator); indicator.parameters:addInteger("K", "K", "Parameter of stochastic", 5); indicator.parameters:addInteger("SD", "SD", "Parameter of stochastic", 3); indicator.parameters:addInteger("D", "D", "Parameter of stochastic", 3); indicator.parameters:addBoolean("I", "Indicator mode", "Keep true value to display labels and lines. Set this parameter to false when the indicator is used in another indicator.", true); indicator.parameters:addColor("D_color", "Color of Divergence line", "", core.rgb(0, 155, 255)); indicator.parameters:addColor("UP_color", "Color of Uptrend", "", core.rgb(255, 0, 0)); indicator.parameters:addColor("DN_color", "Color of Downtend", "", core.rgb(0, 255, 0)); end -- Indicator instance initialization routine -- Processes indicator parameters and creates output streams -- Parameters block local I; local DD; local UP_color; local DN_color; local first; local source = nil; -- Streams block local D = nil; local UP = nil; local DN = nil; local Stochastic = nil; local lineid = nil; -- Routine function Prepare() I = instance.parameters.I; DD = instance.parameters.DD; UP_color = instance.parameters.UP_color; DN_color = instance.parameters.DN_color; source = instance.source; Stochastic = core.indicators:create("STOCHASTIC", source, instance.parameters.K,instance.parameters.SD,instance.parameters.D); first = Stochastic.DATA:first(); local name = profile:id() .. "(" .. source:name() .. ", " .. instance.parameters.K .. ", " .. instance.parameters.SD .. ", " .. instance.parameters.D .. ")"; instance:name(name); D = instance:addStream("Stochastic", core.Line, name .. ".Stochastic", "Stochastic", instance.parameters.D_color, first, -1); D:setPrecision(math.max(2, instance.source:getPrecision())); D:addLevel(20); D:addLevel(80); if I then UP = instance:createTextOutput ("Up", "Up", "Wingdings", 10, core.H_Center, core.V_Top, instance.parameters.UP_color, -1); DN = instance:createTextOutput ("Dn", "Dn", "Wingdings", 10, core.H_Center, core.V_Bottom, instance.parameters.DN_color, -1); else UP = instance:addStream("UP", core.Bar, name .. ".UP", "UP", instance.parameters.D_color, first, -1); UP:setPrecision(math.max(2, instance.source:getPrecision())); DN = instance:addStream("DN", core.Bar, name .. ".DN", "DN", instance.parameters.D_color, first, -1); DN:setPrecision(math.max(2, instance.source:getPrecision())); end end local pperiod = nil; local pperiod1 = nil; local line_id = 0; -- Indicator calculation routine function Update(period, mode) -- if recaclulation started - remove all if pperiod ~= nil and pperiod > period then core.host:execute("removeAll"); end pperiod = period; -- process only candles which are already closed closed. if pperiod1 ~= nil and pperiod1 == source:serial(period) then return ; end pperiod1 = source:serial(period) period = period - 1; Stochastic:update(mode); if period >= first then D[period] = Stochastic.K[period]; if period >= first + 2 then processBullish(period - 2); processBearish(period - 2); end end end function processBullish(period) if isTrough(period) then local curr, prev; curr = period; prev = prevTrough(period); if prev ~= nil then if Stochastic.K[curr] > Stochastic.K[prev] and source.low[curr] < source.low[prev] then if I then DN:set(curr, Stochastic.K[curr], "\225", "Classic bullish"); line_id = line_id + 1; core.host:execute("drawLine", line_id, source:date(prev), Stochastic.K[prev], source:date(curr), Stochastic.K[curr], DN_color); else DN[period] = curr - prev; end elseif Stochastic.K[curr] < Stochastic.K[prev] and source.low[curr] > source.low[prev] then if I then DN:set(curr, Stochastic.K[curr], "\225", "Reversal bullish"); line_id = line_id + 1; core.host:execute("drawLine", line_id, source:date(prev), Stochastic.K[prev], source:date(curr), Stochastic.K[curr], DN_color); else DN[period] = -(curr - prev); end end end end end function isTrough(period) local i; if Stochastic.K[period] < Stochastic.K[period - 1] and Stochastic.K[period] < Stochastic.K[period + 1] then for i = period - 1, first, -1 do if Stochastic.K[i] > 80 then return true; elseif Stochastic.K[period] > Stochastic.K[i] then return false; end end end return false; end function prevTrough(period) local i; for i = period - 5, first, -1 do if Stochastic.K[i] <= Stochastic.K[i - 1] and Stochastic.K[i] < Stochastic.K[i - 2] and Stochastic.K[i] <= Stochastic.K[i + 1] and Stochastic.K[i] < Stochastic.K[i + 2] then return i; end end return nil; end function processBearish(period) if isPeak(period) then local curr, prev; curr = period; prev = prevPeak(period); if prev ~= nil then if Stochastic.K[curr] < Stochastic.K[prev] and source.high[curr] > source.high[prev] then if I then UP:set(curr, Stochastic.K[curr], "\226", "Classic bearish"); line_id = line_id + 1; core.host:execute("drawLine", line_id, source:date(prev), Stochastic.K[prev], source:date(curr), Stochastic.K[curr], UP_color); else UP[period] = curr - prev; end elseif Stochastic.K[curr] > Stochastic.K[prev] and source.high[curr] < source.high[prev] then if I then UP:set(curr, Stochastic.K[curr], "\226", "Reversal bearish"); line_id = line_id + 1; core.host:execute("drawLine", line_id, source:date(prev), Stochastic.K[prev], source:date(curr), Stochastic.K[curr], UP_color); else UP[period] = -(curr - prev); end end end end end function isPeak(period) local i; if Stochastic.K[period] > Stochastic.K[period - 1] and Stochastic.K[period] > Stochastic.K[period + 1] then for i = period - 1, first, -1 do if Stochastic.K[i] < 20 then return true; elseif Stochastic.K[period] < Stochastic.K[i] then return false; end end end return false; end function prevPeak(period) local i; for i = period - 5, first, -1 do if Stochastic.K[i] >= Stochastic.K[i - 1] and Stochastic.K[i] > Stochastic.K[i - 2] and Stochastic.K[i] >= Stochastic.K[i + 1] and Stochastic.K[i] > Stochastic.K[i + 2] then return i; end end return nil; end