function Init() indicator:name("MACD Divergence"); indicator:description(""); indicator:requiredSource(core.Bar); indicator:type(core.Oscillator); indicator.parameters:addInteger("MACD_Short", "Period of short EMA for MACD", "", 12); indicator.parameters:addInteger("MACD_Long", "Period of long EMA for MACD", "", 26); indicator.parameters:addInteger("MACD_Signal", "Signal period of MACD", "", 9); 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 local I; local DD; local UP_color; local DN_color; local first; local source = nil; local D = nil; local UP = nil; local DN = nil; local MACD = nil; local lineid = nil; 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; MACD = core.indicators:create("MACD", source.close, instance.parameters.MACD_Short,instance.parameters.MACD_Long,instance.parameters.MACD_Signal); first = MACD.DATA:first(); local name = profile:id() .. "(" .. source:name() .. ", " .. instance.parameters.MACD_Short .. ", " .. instance.parameters.MACD_Long .. ", " .. instance.parameters.MACD_Signal .. ")"; instance:name(name); D = instance:addStream("MACD", core.Line, name .. ".MACD", "MACD", instance.parameters.D_color, first, -1); 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); DN = instance:addStream("DN", core.Bar, name .. ".DN", "DN", instance.parameters.D_color, first, -1); end end local pperiod = nil; local pperiod1 = nil; local line_id = 0; function Update(period, mode) if pperiod ~= nil and pperiod > period then core.host:execute("removeAll"); end pperiod = period; if pperiod1 ~= nil and pperiod1 == source:serial(period) then return ; end pperiod1 = source:serial(period) period = period - 1; MACD:update(mode); if period >= first then D[period] = MACD.DATA[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 MACD.DATA[curr] > MACD.DATA[prev] and source.low[curr] < source.low[prev] then if I then DN:set(curr, MACD.DATA[curr], "\225", "Classic bullish"); line_id = line_id + 1; core.host:execute("drawLine", line_id, source:date(prev), MACD.DATA[prev], source:date(curr), MACD.DATA[curr], DN_color); else DN[period] = curr - prev; end elseif MACD.DATA[curr] < MACD.DATA[prev] and source.low[curr] > source.low[prev] then if I then DN:set(curr, MACD.DATA[curr], "\225", "Reversal bullish"); line_id = line_id + 1; core.host:execute("drawLine", line_id, source:date(prev), MACD.DATA[prev], source:date(curr), MACD.DATA[curr], DN_color); else DN[period] = -(curr - prev); end end end end end function isTrough(period) local i; if MACD.DATA[period] < 0 and MACD.DATA[period] < MACD.DATA[period - 1] and MACD.DATA[period] < MACD.DATA[period + 1] then for i = period - 1, first, -1 do if MACD.DATA[i] > 0 then return true; elseif MACD.DATA[period] > MACD.DATA[i] then return false; end end end return false; end function prevTrough(period) local i; for i = period - 5, first, -1 do if MACD.DATA[i] <= MACD.DATA[i - 1] and MACD.DATA[i] < MACD.DATA[i - 2] and MACD.DATA[i] <= MACD.DATA[i + 1] and MACD.DATA[i] < MACD.DATA[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 MACD.DATA[curr] < MACD.DATA[prev] and source.high[curr] > source.high[prev] then if I then UP:set(curr, MACD.DATA[curr], "\226", "Classic bearish"); line_id = line_id + 1; core.host:execute("drawLine", line_id, source:date(prev), MACD.DATA[prev], source:date(curr), MACD.DATA[curr], UP_color); else UP[period] = curr - prev; end elseif MACD.DATA[curr] > MACD.DATA[prev] and source.high[curr] < source.high[prev] then if I then UP:set(curr, MACD.DATA[curr], "\226", "Reversal bearish"); line_id = line_id + 1; core.host:execute("drawLine", line_id, source:date(prev), MACD.DATA[prev], source:date(curr), MACD.DATA[curr], UP_color); else UP[period] = -(curr - prev); end end end end end function isPeak(period) local i; if MACD.DATA[period] > 0 and MACD.DATA[period] > MACD.DATA[period - 1] and MACD.DATA[period] > MACD.DATA[period + 1] then for i = period - 1, first, -1 do if MACD.DATA[i] < 0 then return true; elseif MACD.DATA[period] < MACD.DATA[i] then return false; end end end return false; end function prevPeak(period) local i; for i = period - 5, first, -1 do if MACD.DATA[i] >= MACD.DATA[i - 1] and MACD.DATA[i] > MACD.DATA[i - 2] and MACD.DATA[i] >= MACD.DATA[i + 1] and MACD.DATA[i] > MACD.DATA[i + 2] then return i; end end return nil; end